Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0ad64736bbea32f…

MALICIOUS

PDF

74.6 KB Created: 2021-06-11 14:13:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: c2b7dd5b8db9afaacdd503ec04bc5f2d SHA-1: 66a55f62e8ea26a693ec0244c8ff949c79e44ba8 SHA-256: e0ad64736bbea32f4ac5e08f45ee80959c71674210f6c6a12eca99cc714eca24
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, flagging it as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or redirection scheme to facilitate phishing or scam operations. The embedded content, though heavily obfuscated, likely serves as a lure to these external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://philabc.ru/pbw?utm_term=my+cute+roommate+walkthrough PDF link annotation
    • https://zixotojene.weebly.com/uploads/1/3/4/3/134315054/sijinej-simirumanaw-zuvirite.pdfIn PDF document text
    • https://vopesowe.weebly.com/uploads/1/3/4/6/134638419/1985806.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419818/normal_5ffa1471bb327.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405459/normal_606522e5a9352.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4529281/normal_6060457b46034.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4527902/normal_60bf178926956.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403561/normal_600b7a14716f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459481/normal_60bc098d913cb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427528/normal_5fe11ba8e93f7.pdfIn PDF document text
    • https://vomefamatufovo.weebly.com/uploads/1/3/4/3/134378522/1ed510e6718a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484365/normal_605034182675a.pdfIn PDF document text
    • https://vilegewadaw.weebly.com/uploads/1/3/5/3/135324537/nimelataw.pdfIn PDF document text
    • https://mizewipexu.weebly.com/uploads/1/3/4/6/134609608/76367114c4.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/add34e90-ddee-41ff-89d3-7d6cc19aeb40/79827564810.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db7cb2b2-e02f-47a6-a13a-7a9fb63b79c3/how_long_are_the_first_5_harry_potter_movies.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a8bdc84-fa0b-428f-998f-a8ebd9b41708/how_do_you_use_gluma_desensitizer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/670f5cd1-7c26-4633-be1a-232e6883861d/zavudarenegarumeru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c59b4ed2-cb55-42e3-af39-c8116e2eaee6/73023694126.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48adc0af-1083-49da-8537-4a08cfb73ba6/21610873725.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ab1a236-b4cd-450a-8962-e6982dbd3464/lexmark_ms310dn_all_lights_blinking.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54e63983-c0c8-4793-a881-4f1096e30303/58548222639.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1f32303-1799-405d-8c24-6d1d91a64450/73346334944.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/686e10e8-70bd-4412-a619-82db25118f5e/what_is_the_best_blade_for_a_radial_arm_saw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3852ad6a-613a-4e8a-a0c9-f68da7f3d68f/nifivokekokoxapasujara.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_off0000e704.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE704 5300 bytes
SHA-256: 1d6caaffe745a9e8975cd3d57c89dbd12bb35099e78fd63655d7cd81f8b8eaf0
font_01_sfnt_off0000f906.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF906 10596 bytes
SHA-256: 351be931bbec921af396aace8948b7e3dc5f78adbfb9d3adf37de9ba4978bbb2

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