Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2a45dcbe4314083…

MALICIOUS

PDF

80.4 KB Created: 2021-03-10 23:21:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: a36859eceeb0ea60c5c9d0bed1bf341c SHA-1: 35263d665f9eba5eea0fe8363a948a65a2d8701b SHA-256: c2a45dcbe4314083a587ba56e6d1cefdadad61a70283f3afcb1848e8e2877193
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dafemum.ru/aws?utm_term=what+is+the+present+tense+of+the+verb+listen PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4474475/normal_601bbfd2d1905.pdfIn PDF document text
    • http://medyayazilimtr.com/rollerball_movie_review5twhu.pdfIn PDF document text
    • https://pisekubil.weebly.com/uploads/1/3/4/3/134322001/joxevibe_zupenil.pdfIn PDF document text
    • https://cdn.sqhk.co/jawefujivi/AgiCNG9/brad_mehldau_highway_rider_vinyl.pdfIn PDF document text
    • https://tadilagene.weebly.com/uploads/1/3/1/3/131381422/bawemalezuvedola.pdfIn PDF document text
    • http://s-tochka.ru/japanese_blossom_vector_freeylo8c.pdfIn PDF document text
    • https://todumubisopid.weebly.com/uploads/1/3/5/3/135312552/9330247.pdfIn PDF document text
    • https://cdn.sqhk.co/dowepigakaw/OjiA0hi/sniper_elite_4_switch.pdfIn PDF document text
    • http://uplrezina.site/westinghouse_microwave_user_manualken9t.pdfIn PDF document text
    • https://cdn.sqhk.co/dubutemaruxu/0pSgdji/zanotodenodineze.pdfIn PDF document text
    • https://jopixumux.weebly.com/uploads/1/3/4/7/134734794/c34f3aeb73f.pdfIn PDF document text
    • http://runmasten.online/41055750411ya9ng.pdfIn PDF document text
    • https://toxafowusolele.weebly.com/uploads/1/3/2/8/132815148/pumafaga.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388065/normal_601277abcd38f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416319/normal_60343928c5a69.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://movetikopuvus.epizy.com/49385992884.pdfIn PDF document text
    • http://sizosuxexe.epizy.com/are_coroners_reports_public_record.pdfIn PDF document text
    • http://kiwusumusi.rf.gd/8846486339.pdfIn PDF document text
    • http://pumonufagatoteb.epizy.com/hl7_cda_implementation_guide.pdfIn PDF document text
    • http://fuvogixerad.epizy.com/48622533523.pdfIn PDF document text
    • http://mizizasuz.epizy.com/vtech_phone_answering_machine_message.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d806.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD806 3080 bytes
SHA-256: a8067399dab3e165636e69de272949cd66350204d6246dda8fff575c887ec2eb
font_01_sfnt_off0000e307.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE307 5200 bytes
SHA-256: 46339279c5f1b1d8f989b76e09252470d0d10015b5946ef053088723ed244637
font_02_sfnt_off0000f4c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4C1 11824 bytes
SHA-256: a71f296f177ca6b91835fa49c38e876dedeab0550c48a97b13bafdd63d79e5dd
font_03_sfnt_off00011bee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BEE 16684 bytes
SHA-256: a858ad06ee9285ef990c8ccf5509e6bce71cae8afc7f99ba8a1dcaf33198b628

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