Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bbaa90978846d16…

MALICIOUS

PDF

90.9 KB Created: 2021-07-23 01:34:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: a97b90bc380cf9e4123eb3da2e8f498b SHA-1: 7569c32dd326323d08a26a3270c3bcfd7cbbbb64 SHA-256: 0bbaa90978846d1651fd5fcf71522e9d82ec8018a20ad5485ef1b97684c23fe7
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample is a PDF document that employs a payment redirection lure, indicating a likely business email compromise (BEC) or financial fraud attempt. It contains numerous links to external PDFs hosted on compromised websites, suggesting it acts as a dropper or redirector to further malicious content. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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 https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3065da822e---46455835170.pdf In PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/160b47a78a577d---bepimulixoguwudemebopelo.pdfIn PDF document text
    • https://rrr71.ru/upload_picture/kovomorolebupotexelowo.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/160db5061c22a1---kekakukixulebaropusu.pdfIn PDF document text
    • http://www.satunatc.ac.th/ckfinder/userfiles/files/33117853491.pdfIn PDF document text
    • https://www.tangelo.no/wp-content/plugins/formcraft/file-upload/server/content/files/16078e871e8179---nukivotabugitarodoge.pdfIn PDF document text
    • http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160932fbb22ec8---pokis.pdfIn PDF document text
    • https://ozmutludokum.com/userfiles/file/13403162814.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/q09qs3u26s9im6i5hskht1mbc7/13147586675.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b4c99f646a7---49449106956.pdfIn PDF document text
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/t4au2t7lc2t2587gem6qto0dcm/56527906475.pdfIn PDF document text
    • http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/16077f16f4ac69---3933765580.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5cb2a26198---47502270443.pdfIn PDF document text
    • http://www.ks-zahnarztpraxis.de/upload/files/muxilutofe.pdfIn PDF document text
    • https://sonarmusic.hu/up_image/file/kozitobuxebi.pdfIn PDF document text
    • https://harkakotony.hu/UserFiles/file/wozitej.pdfIn PDF document text
    • http://wchs65.org/clients/b/bb/bb65574a37642f7fe3135935df861e67/File/zifixoneketebime.pdfIn PDF document text
    • http://xn--80aaa1acmiejxr6d7fg.xn--p1ai/data/files/moririni.pdfIn PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/309eb2a1abed76bce02bb709f15ea5eb/77521613190.pdfIn PDF document text
    • http://utopiasacramento.org/clients/0/07/071cdeedc048305be324eb10ab8031d4/File/81908847252.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e47d8b9c2c6---87513693633.pdfIn PDF document text
    • http://u15.ch/ckfinder/userfiles/files/6067294045.pdfIn PDF document text
    • http://berallebags.com/UploadFiles/FCKeditor/20210522154851.pdfIn PDF document text
    • http://clinicaveterinariagussago.com/userfiles/files/sugufumag.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=canal+boats+for+sale+with+mooringsPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA1A 10920 bytes
SHA-256: cd38fce72519c1f643b858b0c3b4db04cea7e3a2cdad3fd88d41c76ff043b96d
font_01_sfnt_off00010350.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10350 16092 bytes
SHA-256: 9d5144547e0b729630886a3ad3ce48e7da84b0115899dd9c2390406af6f0fecd
font_02_sfnt_off00011891.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11891 16928 bytes
SHA-256: f8b59aaafe62f56d906a79cfdc7471090b74332c8b0da085107d913f713c15dc
font_03_sfnt_off000144dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144DD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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