Malicious PDF — malware analysis report

Static analysis result for SHA-256 a14495b5d1eeabca…

MALICIOUS

PDF

80.1 KB Created: 2021-03-20 10:37:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 19c44b2ca47d3c7119e1eeab2af5c23e SHA-1: 9e13066d50a6c4f29356b75e2bad5edce5433116 SHA-256: a14495b5d1eeabcae470d1af0b59b5da440ec3b8e9d0db2182fc8d1fd41ad1aa
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious content. The primary URL, https://bologen.ru/wix?keyword=hitman+sniper+android+apk+mod, indicates a lure for potentially malicious software downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • 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://bologen.ru/wix?keyword=hitman+sniper+android+apk+mod PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4406787/normal_603e93cc039f4.pdfIn PDF document text
    • http://krokoboko6.xyz/wosorolawoforoxowusivgnnp4.pdfIn PDF document text
    • http://my-favshopf.online/flowers_for_algernon_characters_summaryx5ie4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420238/normal_60472c34b72c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481852/normal_6035485f19f9e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387815/normal_5ff209a3e5cbe.pdfIn PDF document text
    • http://rabizepafuxonag.mypressonline.com/64443476802.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6cdb29d4-22ce-4aaf-9e51-562b59d50851.filesusr.com/ugd/1b20fb_1b4a57876ca44556ae82ce9894686a90.pdf?index=trueIn PDF document text
    • http://vunonam.atwebpages.com/what_is_complex_trauma_in_mental_health.pdfIn PDF document text
    • https://ec679cc6-872a-45a8-b2fd-b1bc8f6ddb77.filesusr.com/ugd/d1d005_781342f77db241fb862905cc78f98674.pdf?index=trueIn PDF document text
    • https://f8d4b294-f952-4a11-85e8-0a3036f9bdaf.filesusr.com/ugd/ad8f3a_574655b14ac2437b9cabd363d9da594b.pdf?index=trueIn PDF document text
    • https://391e4f24-9fc9-4707-ac06-338edcd9f959.filesusr.com/ugd/110ef3_e542517c960746aea8d4e9ce1aed94eb.pdf?index=trueIn PDF document text
    • https://59cf682b-6680-4a08-8b8d-0472bab64ef7.filesusr.com/ugd/d7d6cd_b407501db8d14c55b2784cd5e8889aaf.pdf?index=trueIn PDF document text
    • https://81da36f4-dec6-4bf4-836b-19ed67500659.filesusr.com/ugd/5fd5c1_744af80ec107435b8dd111a2125c9d31.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/setigafat/history_maker_trumpet_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/zetituri/vexesutu.pdfIn PDF document text
    • https://s3.amazonaws.com/lodazojamuva/eucharist_catholic_answers.pdfIn PDF document text
    • https://cf075d60-af7c-4c71-a16c-5c8c125a9bb7.filesusr.com/ugd/cc03df_198c6eb40eea41d390705e5b346afaa7.pdf?index=trueIn PDF document text
    • https://4f65703b-d4c0-4c9c-9e30-73c8cc83ec5d.filesusr.com/ugd/54fa57_cfdbf923b06b4c639186bc3122afa8b1.pdf?index=trueIn PDF document text
    • https://4c5ad993-366d-4b3a-aa99-9b6f56583180.filesusr.com/ugd/01e791_78897bb7dd2e4d3fa5612225f1c342f2.pdf?index=trueIn PDF document text
    • https://43081b45-6e48-4b43-b724-9328fda377ae.filesusr.com/ugd/26481d_d9615918a7ab4fecbccefa0658ba068b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tobaziw/xenon_valkyrie_plus_trophy_guide.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_off0000ebb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBB2 5096 bytes
SHA-256: 3964b747cc37706faec4be92b4ac36191b1fdceb204d968bbce124a056bd6e06
font_01_sfnt_off0000fce7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCE7 17172 bytes
SHA-256: 67cb248e3ffb8471c5ac3660c16c38928727cb6acd7a1539fab0d95ed5ed4258