Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc9d2cf09413b849…

MALICIOUS

PDF

73.9 KB Created: 2021-03-07 18:21:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 2183a393a68bc2a462ed0646098d1c42 SHA-1: 9cb87303299a99d9f00c710768bf0c79dbaee100 SHA-256: dc9d2cf09413b849e12ff68e435f37534a074dcccca9381bc994a7d562cef04f
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 large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and extensive external linking are indicative of a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://bologen.ru/123?utm_term=the+adventures+of+augie+march+first+paragraph PDF link annotation
    • https://tigasuzile.weebly.com/uploads/1/3/1/3/131379741/getumeneketafedig.pdfIn PDF document text
    • https://dasujodiket.weebly.com/uploads/1/3/4/4/134481559/gebenalotir-jiwumutakiri.pdfIn PDF document text
    • https://sagagokibifaku.weebly.com/uploads/1/3/4/6/134625973/belunogawisig.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475853/normal_602a9de2d0eb3.pdfIn PDF document text
    • https://wupupuredizuso.weebly.com/uploads/1/3/4/8/134894828/gewekakasivikud.pdfIn PDF document text
    • https://nifakisafuzum.weebly.com/uploads/1/3/0/7/130775286/791dc4c.pdfIn PDF document text
    • https://zowadadevifu.weebly.com/uploads/1/3/4/5/134597758/fd98e.pdfIn PDF document text
    • https://cdn.sqhk.co/zimajigon/djiifie/business_manager_job_profile_example.pdfIn PDF document text
    • https://cdn.sqhk.co/bitizulokiva/glMjjge/hey_clay_monsters_code.pdfIn PDF document text
    • https://pakilimog.weebly.com/uploads/1/3/4/3/134363837/66899.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370054/normal_5fdcfa55b8184.pdfIn PDF document text
    • https://cdn.sqhk.co/kufomopinu/hjb8pii/37655808137.pdfIn PDF document text
    • https://cdn.sqhk.co/pevizopubok/dpqghPQ/marketing_plan_for_real_estate_agents.pdfIn PDF document text
    • https://babujotiju.weebly.com/uploads/1/3/4/7/134751526/1323525.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481065/normal_5ff9e2a30a5aa.pdfIn PDF document text
    • https://vejazejama.weebly.com/uploads/1/3/1/3/131381369/6611180.pdfIn PDF document text
    • https://kasipuxatupar.weebly.com/uploads/1/3/5/9/135966953/wumasodanepa-fukanutodawebis-nuzunifaror-kogiludozujuwel.pdfIn PDF document text
    • https://pewovejike.weebly.com/uploads/1/3/5/3/135319851/nodogariwubaz.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/rujabepifar/sebirekelomorogawo.pdfIn PDF document text
    • https://s3.amazonaws.com/lebaxa/free_child_travel_consent_form_template.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_off0000e326.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE326 5544 bytes
SHA-256: 004a4ccf31e055695532cbd840550023bb3ab0b09f8cadc0cd1295a697d8d9f7
font_01_sfnt_off0000f5e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5E6 10632 bytes
SHA-256: b6db6623212b016e2458ab398328c4aba6493103d624765fb472fbf821f9b076

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