Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fe8c52f9a63c7ad…

MALICIOUS

PDF

78.9 KB Created: 2021-02-28 12:29:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: ee4c6d6b98d1015d4617fd316c9a1efa SHA-1: 20b32a4b3b1f294a8eb72bd7a62893835fd1e159 SHA-256: 8fe8c52f9a63c7adcb6f7e125fb6c693c25d1815bed090944a02cfb1b22fc087
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs and is flagged as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded links are indicative of techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://gimoguvi.ru/123?utm_term=altar+server+training+clipart PDF link annotation
    • http://luxasireku.sportsontheweb.net/26658583831.pdfIn PDF document text
    • http://shlifovka-pol.website/bold_italic_font_freeuyfp9.pdfIn PDF document text
    • https://kuboteradaragi.weebly.com/uploads/1/3/1/4/131482952/zomibidimilefijakug.pdfIn PDF document text
    • https://bugajujifupub.weebly.com/uploads/1/3/4/8/134894919/nudufe.pdfIn PDF document text
    • http://shoop-fg.ru/pigamokoxig6qu3.pdfIn PDF document text
    • http://clientbluebadge.com/atlante_di_istologia_e_anatomia_microscopica9df10.pdfIn PDF document text
    • http://ouily.xyz/1729025352xg9n9.pdfIn PDF document text
    • http://matawobedopikam.mywebcommunity.org/end_of_the_world_movies_on_hulu_or_netflix.pdfIn PDF document text
    • https://xitukamobem.weebly.com/uploads/1/3/4/6/134643312/deef7acb98a1.pdfIn PDF document text
    • http://kixiwogazu.sportsontheweb.net/diet_cleansing_drinks_to_lose_weight.pdfIn PDF document text
    • https://zagiwesojuju.weebly.com/uploads/1/3/2/7/132712322/2677990.pdfIn PDF document text
    • https://motodamoz.weebly.com/uploads/1/3/1/4/131452818/nosolukofiv_ralamifegubika_digewurajotemu.pdfIn PDF document text
    • https://ronenajawewaxiw.weebly.com/uploads/1/3/4/5/134594127/4856167.pdfIn PDF document text
    • https://tivepikilusu.weebly.com/uploads/1/3/4/7/134759048/9923678.pdfIn PDF document text
    • http://ruguwafe.scienceontheweb.net/tezifopidulopizasilab.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/daraniwekamidir/worksheet_feeling_and_emotion.pdfIn PDF document text
    • https://s3.amazonaws.com/ninazarila/supercell_boom_beach.pdfIn PDF document text
    • https://s3.amazonaws.com/widuxade/rental_property_depreciation_schedule_template.pdfIn PDF document text
    • https://s3.amazonaws.com/firudegix/crabs_adjust_humidity_card_list.pdfIn PDF document text
    • http://tiwatimab.atwebpages.com/81370461140.pdfIn PDF document text
    • https://s3.amazonaws.com/nuselufuzo/html_website_templates_for_business.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

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_off0000f8bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8BB 5152 bytes
SHA-256: 2ce3a175866e2e4e6a82385bc7abc838cffbac6831bfda2dd95b74548611874b
font_01_sfnt_off00010a5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A5E 10556 bytes
SHA-256: 7df20283eb875de027840f03c6c0133f011f2b935750a528bd697fad088b9890

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