Malicious PDF — malware analysis report

Static analysis result for SHA-256 9abe1b622e4e8b05…

MALICIOUS

PDF

76.6 KB Created: 2021-09-12 18:37:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 9d6dc25c1dd3a498fc821b5df643c002 SHA-1: 8a7495ab270ba0ec8a6680efb6a5d7932e243c4d SHA-256: 9abe1b622e4e8b05907b8fd3fd2ed911c4423dd93c97f67fa52f61397fe381fa
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged as malicious by a machine learning classifier and ClamAV. It contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, suggesting a link farm designed to redirect users. The presence of these links indicates an attempt to lead users to malicious content, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://pmke.cz/pictures/files/36906452690.pdf In PDF document text
    • http://tavaszitura.eu/userfiles/files/52578109337.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1612ec455d06bb---49957089259.pdfIn PDF document text
    • https://lensprovn.com/ckfinder/userfiles/files/xinavewuledud.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/02844e3322bdd57e182f3cc0290f521c/potarulewokawejofizemiru.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161374e3e7240b---tepuwepowikusipivisumo.pdfIn PDF document text
    • http://adveotec.com/img/file/94921224813.pdfIn PDF document text
    • https://digireg.it/upload/58581128789.pdfIn PDF document text
    • https://www.icicle-mountaineering.ltd.uk/ckfinder/userfiles/files/dojozezatifasofadom.pdfIn PDF document text
    • https://bnbtravels.com/ckfinder/userfiles/files/87733165916.pdfIn PDF document text
    • http://ttccid.com/userfiles/files/zixumuzidutuma.pdfIn PDF document text
    • http://antoniolescio.net/userfiles/files/30065190332.pdfIn PDF document text
    • http://uticachemical.com/files/upload/files/30768140409.pdfIn PDF document text
    • http://screen.by/images/file/rasuvasa.pdfIn PDF document text
    • http://belly.bpv.su/content/files/files/42006847161.pdfIn PDF document text
    • https://lifo-sea.com/ckfinder/userfiles/files/3496732968.pdfIn PDF document text
    • http://powerfalcon.net/uppic/files/86369025219.pdfIn PDF document text
    • http://www.hausbaumesse.at/ckfinder/userfiles/files/77677176497.pdfIn PDF document text
    • http://codienlanhtrangia.com/Images_upload/files/26172409149.pdfIn PDF document text
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d08fa6d064---88772890001.pdfIn PDF document text
    • https://8cj2aja7-8mxb.com/contents/files/83725215054.pdfIn PDF document text
    • http://exhibitionchannel.com/upload/70366190699.pdfIn PDF document text
    • http://fashionflutters.com/ckfinder/userfiles/files/ditevusojawuvam.pdfIn PDF document text
    • http://aokisuper.com/ckfinder/userfiles/files/zoranowokuni.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=how+many+days+chicken+can+be+kept+in+fridgePDF 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_off0000c5dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5DD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ddef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDEF 17272 bytes
SHA-256: c2484280e174c62c43b93b61cd401ae2b3ea11e2b9d0e23a9dc269b743b570ef
font_02_sfnt_off00010a53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A53 11444 bytes
SHA-256: 86d9f6aaa4cc66ced965a44a09d8b182b789e0918ad13bc73d9e409968f25c1a

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