Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8acafe179310982…

MALICIOUS

PDF

78.3 KB Created: 2021-04-01 08:09:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 3b9a797464db1fb776c0d408cfeca7d6 SHA-1: 38c30216149612d6861da6ac2eae64df43d759a9 SHA-256: f8acafe179310982e352e3955916f630e655b82bea14c363c1df82f395038640
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 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.
  • 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://soxebez.ru/strik?utm_term=does+tricare+cover+my+pregnant+girlfriend PDF link annotation
    • https://telozigigozato.weebly.com/uploads/1/3/4/3/134310186/5310717.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490974/normal_60531e3ce98e3.pdfIn PDF document text
    • https://gosibipidumoduj.weebly.com/uploads/1/3/4/3/134318513/4685472.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368493/normal_6001e5984ec4e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384639/normal_5fd661d801b1c.pdfIn PDF document text
    • http://tiwomizodelujew.22web.org/24523011380.pdfIn PDF document text
    • http://nuxipawuxodiwa.getenjoyment.net/dobabibebukalewelopipu.pdfIn PDF document text
    • https://pediralesozalos.weebly.com/uploads/1/3/4/5/134595574/71bb4ec43df.pdfIn PDF document text
    • https://fudixiboronis.weebly.com/uploads/1/3/4/3/134322082/xozuduxaguraz_dowowekuponaseg.pdfIn PDF document text
    • https://bopidojosonek.weebly.com/uploads/1/3/1/3/131384153/89664f016c4.pdfIn PDF document text
    • http://luwogexejel.getenjoyment.net/asvab_test_prep.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/legipalofi/top_5_army_games_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/zevutebulaworel/detailed_information_about_gst_in_india.pdfIn PDF document text
    • https://s3.amazonaws.com/wewuxuviwar/panasonic_kx-tga410_voicemail.pdfIn PDF document text
    • https://s3.amazonaws.com/wujafivabipo/kdigo_anemia_guidelines_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/pokorevalaxex/kumon_math_answer_book_level_f.pdfIn PDF document text
    • https://s3.amazonaws.com/winumigutam/wusodonejibiwovur.pdfIn PDF document text
    • https://s3.amazonaws.com/xajowu/able_resume_templates_for_microsoft_word.pdfIn PDF document text
    • http://lurapuven.epizy.com/sijidomakesemufotijejuki.pdfIn PDF document text
    • http://ligoroxenafof.atwebpages.com/international_marketing_in_economics.pdfIn PDF document text
    • http://wixudilasajigil.rf.gd/39323228329.pdfIn PDF document text
    • https://s3.amazonaws.com/jonora/coshh_data_sheets_tesco.pdfIn PDF document text
    • https://s3.amazonaws.com/jimugivos/how_to_combine_two_tables_in_google_docs.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_off0000f264.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF264 5636 bytes
SHA-256: 07b521ce89c160af5a5d25b4685ce59c2dfa6da23ca7357c2650363038847e67
font_01_sfnt_off00010594.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10594 10692 bytes
SHA-256: 292920348cf4449404408ba53d76246221ba1ee2714a834d8cc3895695443753

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