Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cac508426684571…

MALICIOUS

PDF

74.2 KB Created: 2021-02-08 14:42:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 74485cc6a64fe840bd3ec21ca03365fd SHA-1: ee52a20d1d092fbfac8b312b6cd1a7c7c36f6958 SHA-256: 3cac508426684571684f20e72cd8703cec8cfe3427d2706d18c0cbdd7e871af3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded external links, flagged as a 'PDF_SEO_LINK_FARM' heuristic. One of the primary URLs, 'https://baarspo.ru/wb?keyword=adf.%20ly%20minecraft%20apk', suggests a lure related to game downloads, potentially to distribute malware or conduct phishing. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://baarspo.ru/wb?keyword=adf.%20ly%20minecraft%20apk PDF link annotation
    • http://pimazisiperej.iblogger.org/kodupisakebalexagufapivix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444648/normal_5fd8a132af684.pdfIn PDF document text
    • https://pepomujotopulog.weebly.com/uploads/1/3/4/8/134873529/zised.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459029/normal_5ff75fd58356d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403683/normal_5fe66247b600f.pdfIn PDF document text
    • https://purotuduveb.weebly.com/uploads/1/3/0/7/130738796/kojalopajab_zagazim.pdfIn PDF document text
    • https://sakafafemowuva.weebly.com/uploads/1/3/4/6/134694971/2598288.pdfIn PDF document text
    • https://panikudar.weebly.com/uploads/1/3/1/4/131437701/c613b7c025de7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479433/normal_60040248bbdfc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pujusojup.epizy.com/28851802642.pdfIn PDF document text
    • http://rovututuxopi.epizy.com/fixinisidizifalijafazax.pdfIn PDF document text
    • https://s3.amazonaws.com/falufusu/synaptics_touchpad_driver_windows_8._1.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxexi/aged_care_assessment_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/xilasisefi/chaar_sahibzaade_2_songs_video.pdfIn PDF document text
    • http://vovuvap.rf.gd/90113881607.pdfIn PDF document text
    • https://s3.amazonaws.com/sitozi/mepefepox.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/charity_letterhead_template_uk.pdfIn PDF document text
    • http://vebavibokifoko.epizy.com/aleph_borges_romana.pdfIn PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e16a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE16A 5308 bytes
SHA-256: 6cee948fa0a0c59adb7b813bb510263195345588aa20b90cdd06106e61a3d38f
font_01_sfnt_off0000f377.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF377 12620 bytes
SHA-256: 84f259a97eba7ed1307118b9ca3c1dd6fbf00d72024de4f6369f6b2c600faf6a

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