Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6230b6602f7f703…

MALICIOUS

PDF

70.4 KB Created: 2021-03-12 18:54:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: ccc440483293a44f1320457f9c4cad1b SHA-1: b53e2ba67218f13467fa4bc66710b59f0d6d7c11 SHA-256: c6230b6602f7f7039a1940d51ea3b058783a808e84bf0ac1a139a1b602b637a4
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a phishing or malware distribution attempt. The presence of numerous external URIs, including a link farm on disposable hosting, suggests an effort to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and heuristic firings point towards an attack pattern involving the exploitation of PDF vulnerabilities or social engineering to trick users into downloading further payloads.

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://druttle.ru/award?keyword=big+fat+notebook+math+pdf PDF link annotation
    • http://ttop-shop.com/nulumubafudowizitexonomenk5zy.pdfIn PDF document text
    • http://santand-es.com/civil_engineering_words_dictionary5uxa2.pdfIn PDF document text
    • https://cdn.sqhk.co/xibidodoko/TEyhjky/pro_player_nickname_generator_for_free_fire.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474997/normal_5fd857c5594a4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4505820/normal_5ff2db1e63b66.pdfIn PDF document text
    • http://frankiearvelo.com/gerund_exercises_eslgpl7y.pdfIn PDF document text
    • https://jiwumakot.weebly.com/uploads/1/3/4/2/134235931/boxuwerurob.pdfIn PDF document text
    • https://neninilez.weebly.com/uploads/1/3/3/9/133986457/c40a3e6a.pdfIn PDF document text
    • http://podeves.xyz/5835405511979d1l.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386086/normal_603af4603e84b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419633/normal_602d67b64cffd.pdfIn PDF document text
    • http://marinarus.space/risk_evaluation_matrixtln2j.pdfIn PDF document text
    • https://cdn.sqhk.co/dowepigakaw/Z4ihjaV/d_h_equipment_blanco_texas.pdfIn PDF document text
    • https://cdn.sqhk.co/xufatirumina/fjgjjhd/civil_war_battles_us_map.pdfIn PDF document text
    • https://cdn.sqhk.co/raxoxawupej/hgkift6/73719762217.pdfIn PDF document text
    • http://d-youtube.com/57566489703ht46x.pdfIn PDF document text
    • https://xafituku.weebly.com/uploads/1/3/4/8/134863640/binokud.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a86a6b26-b473-4b55-b9aa-7628a2bff077.filesusr.com/ugd/4f270c_58df081312014b16b18792822f32281e.pdf?index=trueIn PDF document text
    • https://b70645e9-42d7-44c6-80f2-f165c8819e8d.filesusr.com/ugd/3f1130_1f4fe7d6f6814807842476ba2e4fe39a.pdf?index=trueIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d627.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD627 5400 bytes
SHA-256: 7dd354e9143168f1684a576652453a5bb8f6286d2d17e477d1a9d550ee569dab
font_01_sfnt_off0000e86f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE86F 10588 bytes
SHA-256: cc16510ef39a4f651cc21757826e08e49a25067e7b6342f30a10b79727246af6

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