Malicious PDF — malware analysis report

Static analysis result for SHA-256 e283fbd262352839…

MALICIOUS

PDF

97.8 KB Created: 2021-02-12 18:41:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 199a82227478021ec7d4777fcefa8813 SHA-1: 81e83a16df05adddff7ab1777d72f293c113b00d SHA-256: e283fbd262352839e8ef7e0d989ff79a884e99da4d75615c35135a0babbcb0bf
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 0.9997

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://seumenha.ru/123?utm_term=lacrosse+strength+and+conditioning+pdf PDF link annotation
    • http://wumijodurixemi.22web.org/gatufebewexaves.pdfIn PDF document text
    • https://cdn.sqhk.co/posebozej/HwY8Dgd/tisasinavuti.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470399/normal_5fdbc434b47b4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461219/normal_5fce8c375fdfa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369766/normal_5fd10bfa3dabc.pdfIn PDF document text
    • https://gajebafanagifim.weebly.com/uploads/1/3/2/8/132815836/lunisagekanu.pdfIn PDF document text
    • https://mavabebuvaxar.weebly.com/uploads/1/3/0/8/130814237/d6095c36d466bfc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420030/normal_5fd09cea0289a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499005/normal_5fd8168576d91.pdfIn PDF document text
    • https://cdn.sqhk.co/bilanogakiw/jgTaigq/83414936890.pdfIn PDF document text
    • https://cdn.sqhk.co/wanukawuwota/YEDsz3g/25278789855.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387699/normal_600d81b57d23b.pdfIn PDF document text
    • https://jigotofobab.weebly.com/uploads/1/3/5/3/135300724/fulizetiravodo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415935/normal_5fe0c2e8c6e20.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475847/normal_5fee395833da1.pdfIn PDF document text
    • https://cdn.sqhk.co/rirodute/nPVieo1/best_custom_jumpshot_for_playmaking_shot_creator_2k21.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://rawozenagi.epizy.com/84360340419.pdfIn PDF document text
    • http://lememisuxelivem.rf.gd/estrous_cycle_in_dog.pdfIn PDF document text
    • http://bekujosekufeto.epizy.com/facebook_business_page_template_2019.pdfIn PDF document text
    • http://xupafokivudaked.rf.gd/kikurilalumekazukik.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001357d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1357D 5112 bytes
SHA-256: ae18abd9d43a51ca9d72c46dade1c622c8d7f58a22798341801a290298b1af56
font_01_sfnt_off000146d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146D1 10680 bytes
SHA-256: de8abbd8161377ef51ba9347f6398fa93301437c94701d2f4d1e577c863ef473
font_02_sfnt_off00016b2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16B2A 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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