Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0ee20f7f79f90f0…

MALICIOUS

PDF

69.8 KB Created: 2021-06-09 00:15:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: cf009d74d41e27bd6d2ca5b3edc18ff9 SHA-1: cf96a30420d97a716ccd0c3ef921931cfb7b7cb0 SHA-256: f0ee20f7f79f90f023270bf3f7e2e20e282fe62735e9c5451629e3911f19ffd8
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains a significant number of external links, many pointing to disposable hosting services, indicating a link farm or phishing operation. The presence of 'utm_term' parameters suggests tracking or redirection, common in phishing campaigns. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of malicious intent, likely to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://smidgel.ru/pbw?utm_term=ayaka+genshin+impact PDF link annotation
    • https://motikefivenigem.weebly.com/uploads/1/3/4/7/134709332/3832467.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467287/normal_603276f718ddb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470205/normal_604f6d9c068fd.pdfIn PDF document text
    • https://losanuritajog.weebly.com/uploads/1/3/4/7/134730792/0a86cbc67330cac.pdfIn PDF document text
    • https://movogabi.weebly.com/uploads/1/3/4/8/134881325/zebufemakupaze-jutotiv-ridubuj.pdfIn PDF document text
    • https://vesasasafej.weebly.com/uploads/1/3/4/7/134758359/rasubu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419437/normal_603bd8c572480.pdfIn PDF document text
    • https://wujorimumoba.weebly.com/uploads/1/3/4/6/134676457/9043045.pdfIn PDF document text
    • https://makigutezun.weebly.com/uploads/1/3/4/7/134707077/3a616623452445.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vakerul.pbworks.com/w/file/fetch/144646755/how_to_use_translate_formula_in_excel.pdfIn PDF document text
    • http://wovonixir.pbworks.com/w/file/fetch/144695415/21029236543.pdfIn PDF document text
    • http://bugedavamib.pbworks.com/w/file/fetch/144898551/togox.pdfIn PDF document text
    • http://gamaxidad.pbworks.com/f/peavey_bandit_112_red_stripe_speaker_upgrade.pdfIn PDF document text
    • http://xuwedateredu.pbworks.com/f/94730524952.pdfIn PDF document text
    • http://mefijunov.pbworks.com/w/file/fetch/144419523/61220207992.pdfIn PDF document text
    • http://xuwuziz.pbworks.com/f/acdsee_pro_10_64_bit_free_download_full_version_with_crack.pdfIn PDF document text
    • http://favakiwosut.pbworks.com/w/file/fetch/144898638/ankhiyon_ke_zarokese_mp3_download.pdfIn PDF document text
    • http://rukutuxeriro.pbworks.com/f/predicting_products_of_chemical_reactions_worksheet_answers_page_61.pdfIn PDF document text
    • http://gebozuj.pbworks.com/f/mad_gunz_hack_unlimited_money.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_off0000d431.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD431 5372 bytes
SHA-256: 7e07d532fd5d10572ed99e95a86c2f9c0fac5928f8736c7617aeb009916469b4
font_01_sfnt_off0000e66c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE66C 10508 bytes
SHA-256: d477f943097946fc0930a4e2ae032a1397c60b5ff830cb2a14bd29df065fb2c3

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