Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0814df7a09af7dd…

MALICIOUS

PDF

76.3 KB Created: 2021-05-23 21:54:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 756b37fb6c65b98ba6cfbde68ad135ee SHA-1: 5a245bbb4a32dd24534f0130103ec965f4b19e53 SHA-256: d0814df7a09af7dda3eb0768d3dfc2804843dc2a4f51d6c5df94a6bcde2b1cd3
186 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though partially corrupted, suggests a lure related to online business, which is consistent with phishing or scam tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jumiwimov.ru/strik?utm_term=how+to+create+an+online+dropship+business PDF link annotation
    • https://xetibipu.weebly.com/uploads/1/3/4/5/134528590/5949965.pdfIn PDF document text
    • https://forelidik.weebly.com/uploads/1/3/0/7/130775511/caa2a42c88e68d.pdfIn PDF document text
    • https://malugerimume.weebly.com/uploads/1/3/4/8/134846891/pigetegirizi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417995/normal_602623c372bea.pdfIn PDF document text
    • https://tipizilij.weebly.com/uploads/1/3/4/4/134462633/gagagofagok.pdfIn PDF document text
    • https://faxakitowe.weebly.com/uploads/1/3/1/4/131437357/tubejixukogu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489244/normal_5fd2c6152a5c1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410211/normal_5fe1753e2c286.pdfIn PDF document text
    • https://detabifaf.weebly.com/uploads/1/3/1/4/131436978/85e6167ef1.pdfIn PDF document text
    • https://lazabegikazake.weebly.com/uploads/1/3/5/3/135315211/7678307.pdfIn PDF document text
    • https://fewefemuge.weebly.com/uploads/1/3/4/3/134372507/9025178.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492875/normal_606662badd90e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418764/normal_5fcb19f71fb7c.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/e1011b57-a73e-465c-bc97-afb47fc1dd65/how_to_set_up_bluetooth_on_samsung_soundbar.pdfIn PDF document text
    • https://s3.amazonaws.com/gujutavevive/draw_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecda183b-0e8c-4131-95bf-1e6c477f4113/12836472900.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ab63c01-e9d1-43f2-bd7b-143bd78ca4ac/99267799393.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/564f6bdc-0a22-4ed3-82e4-32411be7bfc5/25487243071.pdfIn PDF document text
    • https://s3.amazonaws.com/gogoxowiniza/6th_ieo_answer_key_set_b_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab7f6a03-127d-442c-9e54-071d6e10584f/learn_small_english_words_with_tamil_meaning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3154809-56c7-489c-831b-3b3170d8ad42/why_is_my_steam_cleaner_not_steaming.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7dd22008-5485-4154-8280-4cbc5a478b60/how_does_a_dual_dash_cam_work.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_off0000eccf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECCF 5356 bytes
SHA-256: af16768fb7f9786d7cb4623d9c7b93c744bb31210c035f08fc63eeeb6458a0d2
font_01_sfnt_off0000ff04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF04 10728 bytes
SHA-256: 2f08620f401137b41fb505b551925842205ee2f2c2c0dcceed0819b38c0bca9f