Malicious PDF — malware analysis report

Static analysis result for SHA-256 8496011e525b3f11…

MALICIOUS

PDF

82.2 KB Created: 2021-04-15 10:14:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 97930ed89baf8e50d05ddbd8bd999805 SHA-1: e1315f10de9a204e06ceed7c9ad0e86d3bd59b48 SHA-256: 8496011e525b3f1132e0554e79aec08bb401e93dbf41531343bdcecdcadd81a5
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to potentially malicious domains, suggesting a link farm or phishing attempt. The ClamAV detection and ML classifier strongly indicate malicious intent. The primary malicious URL identified is https://fokemale.ru/strik, which is likely used to distribute further payloads or redirect to phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://fokemale.ru/strik?utm_term=how+to+use+mr+coffee+5+cup+programmable+coffee+maker
    • https://jovimujokuva.weebly.com/uploads/1/3/2/6/132695493/9492348.pdf
    • https://mudodikakagiluz.weebly.com/uploads/1/3/4/5/134598929/nekokesubemirupimet.pdf
    • http://betmoy54.com/nefajonujigadosarm187.pdf
    • https://cdn.sqhk.co/bepigulusibe/X8hfy4V/new_latest_ringtone_punjabi_2019_free_download.pdf
    • https://rimedugomo.weebly.com/uploads/1/3/0/7/130740195/tawitik-gefijuzoxutabus-pizuluzanet-vusekum.pdf
    • https://cdn.sqhk.co/pusobatosip/nnihfjg/wezifuxej.pdf
    • https://nawexolaka.weebly.com/uploads/1/3/4/7/134704757/4607294.pdf
    • https://cdn.sqhk.co/mumeriretepi/iJlhahh/84627501090.pdf
    • http://hightrade.club/raxubeleluumqqb.pdf
    • http://goproits.com/do_you_need_a_degree_to_become_a_data_scientistshpg7.pdf
    • https://cdn.sqhk.co/somepizeko/cQIPrrX/97049826185.pdf
    • https://narimokilef.weebly.com/uploads/1/3/4/6/134603618/jukumupipoza-naren-rijivutazoxi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/c53547d6-5ecb-4418-9aa0-4fb0c6c381a3/navy_nec_codes_master_at_arms.pdf
    • https://uploads.strikinglycdn.com/files/935b5e54-88be-4f4b-b85f-54cd2956373b/samsung_hm1350_manual_espaol.pdf
    • https://uploads.strikinglycdn.com/files/0b4f206d-559c-4a7d-8eba-9d479eb50792/54239368810.pdf
    • https://4ac36a2f-1533-488b-b282-cf34cdace458.filesusr.com/ugd/bcfc12_26a7e2b576b143b2b0610e3b325dd90c.pdf?index=true
    • https://60f6da8c-824c-4163-aae9-6195f2ac7ed4.filesusr.com/ugd/7f16bd_712a70bb7cad48d4871426a27b2acfcb.pdf?index=true
    • https://uploads.strikinglycdn.com/files/66033dcc-802e-44fb-99c8-c2ea781bc38e/76637765923.pdf
    • https://a19d597f-2220-41b3-9459-688249e8a20b.filesusr.com/ugd/f19f53_6634700636f440959b54e13e3dee0328.pdf?index=true
    • https://01d7ec8a-e38e-4e33-8c76-1be31754498b.filesusr.com/ugd/24d943_7bd35a164f9e4c1191e318cb63948a57.pdf?index=true
    • https://73856814-13bb-4d44-aeaf-752cce6ba6bd.filesusr.com/ugd/a0d21a_c9d552303da74f1c91169793491d504c.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff70.bin
7c1d75194634f1c48620ad8c284fb66b03e002fd71d63e9b7095bdf45ff3153f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF70 5716 bytes
font_01_sfnt_off000112df.bin
59e00750dfa704c7a32b05c6c1020b7e951c768a6d0ea1f5278b144e6e1c3321		 pdf-font-stream PDF embedded font (sfnt) at offset 0x112DF 11300 bytes

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