Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d0354c8262855a1…

MALICIOUS

PDF

87.1 KB Created: 2021-03-08 23:25:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 492135433334e543076095b96000c3b4 SHA-1: c4d69ebf14df54e09acf7691859bd515f2fc93ec SHA-256: 5d0354c8262855a195bc99fa5eddcb011d9328e5dbd873b7335abb910446cf80
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a significant number of external links, many pointing to disposable hosting services, which is characteristic of SEO link farms used to distribute phishing content or malware. The presence of these links suggests an attempt to lure users to external sites, likely for credential harvesting or further infection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jumiwimov.ru/wix?keyword=kilkreath+temple+guide PDF link annotation
    • http://babubusawase.22web.org/android_games_coming_2019.pdfIn PDF document text
    • https://fopulowaledini.weebly.com/uploads/1/3/1/6/131637921/mitiji.pdfIn PDF document text
    • https://nunavataregexo.weebly.com/uploads/1/3/0/7/130775742/6018164.pdfIn PDF document text
    • https://rujijixagav.weebly.com/uploads/1/3/1/3/131383475/bd41c7ba3802bf3.pdfIn PDF document text
    • https://wunogalabapa.weebly.com/uploads/1/3/4/6/134603674/legafulavapow.pdfIn PDF document text
    • https://wuzizado.weebly.com/uploads/1/3/5/4/135401221/labifeti.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/e36f38bc-8aff-444f-99d8-ae56894156ad/biwolex.pdfIn PDF document text
    • https://9eaa565e-fb97-40b4-b096-d6760803f699.filesusr.com/ugd/55e2c6_05c5dfb38fe24b46b5547899746621b4.pdf?index=trueIn PDF document text
    • http://wewuvarek.epizy.com/85673894853.pdfIn PDF document text
    • https://5fdaa9e0-ad6d-443b-8779-beb8e45026dc.filesusr.com/ugd/05301a_fe2b805904284d289c983cbdbe9225f7.pdf?index=trueIn PDF document text
    • http://xodufabotuxav.rf.gd/fipejelibitavar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28c264f6-40ab-4b8e-97c3-a91a1a85e7c5/20195939721.pdfIn PDF document text
    • http://mukukukeban.rf.gd/9452128193.pdfIn PDF document text
    • http://nekofixas.rf.gd/difinole.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5dd710f-4d32-45be-bfe5-18fac9e24294/thinkorswim_vs_td_ameritrade_mobile.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bb1b06a-5292-4246-ba35-d78a854630cf/vikevaka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/331b9846-ff85-4a01-9a2a-18ff85a3b637/selenium_interview_questions_and_answers_for_3_years_experience.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_off00011a6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A6F 5228 bytes
SHA-256: f0bbe0fa54517bd3cfdb7f71302ddf73ae260d8f9ef5efd725aee9d61f42611b
font_01_sfnt_off00012c0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C0B 10276 bytes
SHA-256: 18d3d56cb5754a74658df0d910c3c0283c8448caff571eba9e36044c052e1822

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