Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c1451cd3e65aad1…

MALICIOUS

PDF

81.4 KB Created: 2021-03-15 04:56:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: ddbd2192a6a6d562757f9e848ed8b100 SHA-1: cd4ce8ff8b95c8de199a3bce7bce6576726c102b SHA-256: 4c1451cd3e65aad101ab02db9a5e99582dc1cfbe70d994a0cda0c2def0c341f2
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://botokaw.ru/wix?keyword=rate+my+professor+asu PDF link annotation
    • https://cdn.sqhk.co/pivokazi/ihijChi/color_change_wrap_prices.pdfIn PDF document text
    • https://cdn.sqhk.co/gisusisabez/4hgidhe/pidivisipisitesofomefera.pdfIn PDF document text
    • https://cdn.sqhk.co/jaguwubax/ieJChHi/solitaire_ring_gold_1_carat.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366660/normal_5fdfdc2a53db8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467979/normal_5fc99f234e323.pdfIn PDF document text
    • https://cdn.sqhk.co/donoluri/ehhJljg/65999309565.pdfIn PDF document text
    • http://pazefezos.mywebcommunity.org/vaxoretujuga.pdfIn PDF document text
    • https://cdn.sqhk.co/mivoteloxip/jBjbgfg/7101420785.pdfIn PDF document text
    • http://visunuduxat.mypressonline.com/63821610156.pdfIn PDF document text
    • https://cdn.sqhk.co/wuzosiboweja/cQ2k5fb/77192092742.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465537/normal_5fc9757321240.pdfIn PDF document text
    • https://cdn.sqhk.co/kokademesuz/mgghjy1/fapanikirakozok.pdfIn PDF document text
    • http://fesalasan.mygamesonline.org/93332972913.pdfIn PDF document text
    • http://fijubigatusurov.scienceontheweb.net/vativetadamoxosavepimif.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379839/normal_6007fdb73bbfa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501962/normal_5ff807004836f.pdfIn PDF document text
    • http://xanusojuruxu.sportsontheweb.net/13693803165.pdfIn PDF document text
    • https://cdn.sqhk.co/zodozane/Yghjjbq/52374956867.pdfIn PDF document text
    • http://fanutoragozogow.sportsontheweb.net/pokepubusupoxoragirojujes.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gotenukevepunin/sentry_safe_won_t_unlock_with_code.pdfIn PDF document text
    • https://s3.amazonaws.com/bejikefowu/sujuwikanezikelokiduxo.pdfIn PDF document text
    • https://s3.amazonaws.com/fosawef/sisopinaner.pdfIn PDF document text
    • https://s3.amazonaws.com/pevuwarobuvowa/corporate_event_planning_checklist_template_free.pdfIn PDF document text
    • http://bivojeda.atwebpages.com/63562246473.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_off000101b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101B8 5124 bytes
SHA-256: bd58ce8122ac2ba690017068f49f936bdd567e10938c68b37003c4aa4796d61f
font_01_sfnt_off00011320.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11320 10992 bytes
SHA-256: e18f480488ccb0e5756786545628807814f30faa221fccf1ef3b14176c8a3496

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