Malicious PDF — malware analysis report

Static analysis result for SHA-256 de0b6d30494d40df…

MALICIOUS

PDF

92.2 KB Created: 2021-07-05 22:36:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: a1cf248a4156f3f529457ef0823e67a9 SHA-1: bd1f1f0349ee0c7266cf647420c63c6ec908eab1 SHA-256: de0b6d30494d40df627ebf6320bc188c494fbcd5cadadc4b8e02aaa7be31e7a2
236 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file exhibits characteristics of an advance-fee scam, using lures related to lotteries, prizes, or parcel deliveries. It contains numerous links to external URLs, many hosted on compromised CMS platforms or disposable domains, suggesting an attempt to distribute further malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://onishi-kyosendo.jp/archive/16389597597.pdf In PDF document text
    • http://fouladsazanco.com/Upload/file/77300020742.pdfIn PDF document text
    • https://activepymes.com/pub/file/kajunuzogusamuded.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1607e499aedd8b---jowosuxadefewaz.pdfIn PDF document text
    • https://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/9367ccb3d4726e4e2e1729f7d32ebb4f/sorefikato.pdfIn PDF document text
    • http://daehwa.info/uploaded/file/85208559336.pdfIn PDF document text
    • https://soudurelausiere.ca/upload/editor/file/rojatenez.pdfIn PDF document text
    • http://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/56e1bbe3e925a8ce2178a8cb154b864e/fojewokuwapabimokezegis.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/jph0gtrhnl6lek1v4bd5rmf4r0/90632945915.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/tft2450mqothdmdplrq54sn8p2/fubijegipidozugevep.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609e22e0ec6c6---69351639564.pdfIn PDF document text
    • http://xn----8sbnbd9chja.xn--p1ai/userfiles/file/fikibuzolerakolokufesat.pdfIn PDF document text
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/d61842d90e67f6453edc2b78b084ab2e/wekunesopumutimunusilujep.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aae64233b6c---visubux.pdfIn PDF document text
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160999b7a2a691---sajuluvikulid.pdfIn PDF document text
    • http://er-trans.com/img/produkty/files/76945666903.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/7rr5cqsit8lhfg0ohje3ikktp1/52452782442.pdfIn PDF document text
    • http://libron.pl/fckupload/assets/file/58959505510.pdfIn PDF document text
    • https://tepihtrava.rs//files/tutugakulokevipafo.pdfIn PDF document text
    • http://russkiivopros.com/images/FCKeditor/file/44820188248.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/2ab6cbe746426c099aeaea2928e3311c/tizelobitopowazuxamerisi.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160a69d40e48c0---94374896106.pdfIn PDF document text
    • https://tortugafilms.ca/adminfiles/file/sowevipirisowuwona.pdfIn PDF document text
    • http://heibldr.hu/FCKfeltoltott/file/tedosapuputebon.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608ad9e07d89b---54566086797.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=electric+cars+coming+in+2021PDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000104fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104FD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011d0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D0F 17520 bytes
SHA-256: bbcd4f693fb3668077d555af635129ec65de13b346641137e7561d1e166c5021
font_02_sfnt_off00014a66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A66 10852 bytes
SHA-256: beeb6d05358aa357a711df46429962305ad8b88faa6d2b6f2584ff03697a2be5

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