Malicious PDF — malware analysis report

Static analysis result for SHA-256 972456cfe6453141…

MALICIOUS

PDF

75.7 KB Created: 2021-03-15 08:05:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 7881f867d18beefedeaf4a46721dff87 SHA-1: f3316aa42698935dc08248bbb471c2f5a586e911 SHA-256: 972456cfe64531417b65612e18024cb63d55680f14bb489b46a528ca5aad7c67
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of numerous external URLs points towards a likely attempt to redirect the user to malicious sites for further exploitation or credential harvesting.

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 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://maypoin.ru/strik?utm_term=sparknotes+lord+of+the+flies+chapter+5+quiz PDF link annotation
    • https://cdn.sqhk.co/jakofawesavo/3BicoAC/halloween_dance_party_decorations.pdfIn PDF document text
    • https://cdn.sqhk.co/lixejudazeza/ymhavci/gobalipuwiguxa.pdfIn PDF document text
    • https://cdn.sqhk.co/temazajilib/EIgjibS/gamers_united_earn_rewards.pdfIn PDF document text
    • https://cdn.sqhk.co/noxivudeva/eYmjgiZ/ant_smasher_app.pdfIn PDF document text
    • https://cdn.sqhk.co/taxodisilif/gdTje9O/vefal.pdfIn PDF document text
    • https://diveziriluro.weebly.com/uploads/1/3/4/4/134447321/7bd77379c0.pdfIn PDF document text
    • https://cdn.sqhk.co/gizoxemovefi/Bdgjhib/ligoz.pdfIn PDF document text
    • https://jimiporumina.weebly.com/uploads/1/3/6/0/136088268/7d1983f2b.pdfIn PDF document text
    • https://ledewamigov.weebly.com/uploads/1/3/4/8/134850019/04106bdb2c.pdfIn PDF document text
    • https://doxorovovo.weebly.com/uploads/1/3/4/4/134479089/miwexujakisulopa.pdfIn PDF document text
    • https://cdn.sqhk.co/vibifexode/A22xhaF/nodizon.pdfIn PDF document text
    • https://cdn.sqhk.co/dugelabomaw/U8ibvif/monster_truck_show_florida_2019.pdfIn PDF document text
    • https://xanowiporak.weebly.com/uploads/1/3/0/8/130814060/sijimovedezi.pdfIn PDF document text
    • https://cdn.sqhk.co/vodadavubex/9hpgh2I/gademirejinusese.pdfIn PDF document text
    • https://cdn.sqhk.co/vutowogipu/X4jflid/space_rangers_legacy_best_ship.pdfIn PDF document text
    • https://cdn.sqhk.co/rifojimuna/oBjhNA4/vimijoxabemosanete.pdfIn PDF document text
    • https://cdn.sqhk.co/makubeku/owLjaNQ/rivals_at_war_firefight_mod_apk_no_root.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/e64b2dc3-321a-45ab-b922-637544869704/27245968748.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6756b239-360a-454c-ad3c-c0ee66c89680/61597957381.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c27da56d-6674-4187-903b-0dcd80037f0e/relel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50911979-7048-47a2-b44d-d4daa60a447e/sibizudiwebogefepitiluzef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49160303-4ddf-4d8b-a5eb-780e923ffdd0/cut_the_rope_gameplay_trailer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e743ca9-1ce8-4bdc-b8ad-0186a8217e74/how_to_invest_in_the_stock_market_for_dummies.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_off0000eb0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB0D 5708 bytes
SHA-256: 00487fd59b05891df9358c3243594dd72d572232c48d8251aed3e0ecabbb0808
font_01_sfnt_off0000fe87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE87 10244 bytes
SHA-256: 75b88757c60161984771588359b4d32ad8a9d218db50447259fa50584a466241

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