Malicious PDF — malware analysis report

Static analysis result for SHA-256 e785ac0e5cea91a8…

MALICIOUS

PDF

95.6 KB Created: 2021-03-28 01:42:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: b7172274c0806ea8c06f6c41b3c3bb7c SHA-1: 124dac59175e311aa138022edb641daa8da59cd1 SHA-256: e785ac0e5cea91a88bd6199329a38124c851fee5d486d46ce6b99548ff7918eb
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 0.9994

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 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://vilenefex.ru/strik?utm_term=total+recall+movie+arnold+schwarzenegger+book PDF link annotation
    • https://cdn.sqhk.co/fijajiles/xhjgcqS/t-_mobile_store_near_me.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375195/normal_601abc29856de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449630/normal_605c2eeae2bf7.pdfIn PDF document text
    • https://tiseworadew.weebly.com/uploads/1/3/5/3/135317060/dce2e656a.pdfIn PDF document text
    • https://cdn.sqhk.co/zoluxoni/4ificwT/fadifelunizupo.pdfIn PDF document text
    • https://vuvitolivudiru.weebly.com/uploads/1/3/2/7/132712253/5a8e0347059bf.pdfIn PDF document text
    • https://cdn.sqhk.co/musezikuzapi/igSBtiq/retrowave_wallpaper_mobile.pdfIn PDF document text
    • https://cdn.sqhk.co/maxanogefo/kNoeoVS/71193558637.pdfIn PDF document text
    • https://luwinititik.weebly.com/uploads/1/3/4/5/134587042/faxesu_samig.pdfIn PDF document text
    • https://tofukoluto.weebly.com/uploads/1/3/0/7/130775982/jenakepab_fobepot_kigew.pdfIn PDF document text
    • https://lugilalosu.weebly.com/uploads/1/3/4/3/134314137/fexebivam.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445333/normal_5fed65de1518c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368760/normal_5ff45e3d93ed6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472766/normal_5fe90dc57fac1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/088dbc4c-6039-43d0-b805-d4a6e80dffbc/mejele.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d5149df-fb3f-4f1a-bba6-3bdaeefa2bc0/31258533022.pdfIn PDF document text
    • https://s3.amazonaws.com/mulerux/29196777584.pdfIn PDF document text
    • https://s3.amazonaws.com/guxosa/dewalt_20v_drill_driver_combo_brushless.pdfIn PDF document text
    • https://s3.amazonaws.com/wujapu/47467466498.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbcfc633-d24b-4674-ac16-b8551871c8f7/11989863282.pdfIn PDF document text
    • https://s3.amazonaws.com/pajeriramal/literature_review_template_mla.pdfIn PDF document text
    • https://s3.amazonaws.com/vipinib/65928339251.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011e52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E52 5708 bytes
SHA-256: 93471bf984c04393a8a4d7e46829ef0880db2ecc0c79897d5380c9b11341292d
font_01_sfnt_off000131ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131AD 12304 bytes
SHA-256: ef80c9796eb9cea54a3f299df57de258873a6a2f006c8c7fae287a6ec8246968
font_02_sfnt_off00015a4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A4C 16036 bytes
SHA-256: 322960140e8024396b5b1c4c028d7a62aefee8ec5a9420328982b465283c0a07

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