Malicious PDF — malware analysis report

Static analysis result for SHA-256 d05f646ed44ec18c…

MALICIOUS

PDF

78.6 KB Created: 2021-02-14 16:39:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: c6ae66dd6e64bf854f431ab367a1d9d5 SHA-1: 9058338e61170956526675ffc4a7f38434ec7896 SHA-256: d05f646ed44ec18c6bbc8788c5471b22633b396f6419c9633337512a10a9d2b3
244 Risk Score

Malware Insights

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

The PDF contains numerous embedded links to external websites, many of which are identified as part of a link farm on disposable hosting. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' indicates that at least one URL points to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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.
  • 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://crophysi.ru/aws?utm_term=tipos+de+aerogeneradores+eolicos+pdf In PDF document text
    • http://mugedly.xyz/zezagizafak7p2g.pdfIn PDF document text
    • http://confirmationhelpcenter.com/baba_ganoush_restaurant_kuchingwhvix.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449604/normal_5fce9c94177c4.pdfIn PDF document text
    • https://cdn.sqhk.co/resilano/0chcigX/joxokumudek.pdfIn PDF document text
    • http://tryse.xyz/boom_beach_mod_apk_new_version_201837aof.pdfIn PDF document text
    • http://abwaab.su/39115570198qhjd1.pdfIn PDF document text
    • https://cdn.sqhk.co/fapetemiji/M8hbhj4/53976465960.pdfIn PDF document text
    • https://xaburopufazig.weebly.com/uploads/1/3/6/0/136051881/kuzodebogal_bawujo_xerani_fujatodiwifadiz.pdfIn PDF document text
    • https://cdn.sqhk.co/zubavagi/gipvKgi/14313538978.pdfIn PDF document text
    • https://sopoxovolofu.weebly.com/uploads/1/3/4/5/134509961/41b4dfc6d080e56.pdfIn PDF document text
    • https://cdn.sqhk.co/xelalizogim/ighoUea/47748343414.pdfIn PDF document text
    • http://itawomen.fun/grundig_s350_manualbcafr.pdfIn PDF document text
    • https://cdn.sqhk.co/marixefe/ggjOyij/30115814872.pdfIn PDF document text
    • http://gouliwer.online/totally_accurate_battle_simulator_secret_unitswoxld.pdfIn PDF document text
    • https://fekakekofum.weebly.com/uploads/1/3/4/6/134656499/legosavaj.pdfIn PDF document text
    • https://cdn.sqhk.co/lifudidu/hgejgAQ/best_live_streaming_apps_to_earn_money.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000f228.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF228 5272 bytes
SHA-256: 79c2bc4e7b60232c9628fb08b899c5ba9d1fb94c8c69980efecd3c2d2722cd1c
font_01_sfnt_off00010427.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10427 12140 bytes
SHA-256: 04344b0f532ce947d0016c5134a16019ec3794630339e74f039e9651bf095bdf

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