Malicious PDF — malware analysis report

Static analysis result for SHA-256 40b6e5470b55e8c6…

MALICIOUS

PDF

74.4 KB Created: 2021-03-09 06:01:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: c29e9b9c1f3c8263373992b2969b9f98 SHA-1: f2aa02988a4bf03568d72e593ab9756903fa6535 SHA-256: 40b6e5470b55e8c6cfc1c3f6651aba4744a38fb75b92128bef29fe7052f07620
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, specifically flagged as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. Some of these links point to potentially malicious content, suggesting the PDF is used as a lure to redirect users to harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://fokemale.ru/wix?keyword=world+war+1+alliances+map+worksheet PDF link annotation
    • https://jazediwugitali.weebly.com/uploads/1/3/4/7/134730671/gabasibomapogajesog.pdfIn PDF document text
    • http://mexuzekinukogip.iblogger.org/how_much_can_private_investigators_make.pdfIn PDF document text
    • https://mixuzurul.weebly.com/uploads/1/3/2/3/132303374/zaxaj.pdfIn PDF document text
    • https://karopudalel.weebly.com/uploads/1/3/4/8/134881347/mokoxuga_rezezilo_pazuvadiz.pdfIn PDF document text
    • https://doxiviju.weebly.com/uploads/1/3/2/3/132302912/574640.pdfIn PDF document text
    • https://vizokajobekaxa.weebly.com/uploads/1/3/0/9/130969885/kalomuxizujimid_ridodu.pdfIn PDF document text
    • http://fizovovapoz.iblogger.org/69978078875.pdfIn PDF document text
    • https://debuvubuni.weebly.com/uploads/1/3/4/8/134846467/1572556.pdfIn PDF document text
    • https://mirepabokotixiz.weebly.com/uploads/1/3/2/7/132712407/8572199.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://dd3a609d-fcd9-461e-ae06-f7e9ec6f332d.filesusr.com/ugd/811c3f_18180e291bbb4ec8aece3e97496cda27.pdf?index=trueIn PDF document text
    • https://78e27e65-9996-4239-a63d-7a21722db537.filesusr.com/ugd/03f576_3e81d7eb6c5a4d789150f70bd3a96389.pdf?index=trueIn PDF document text
    • https://c1bbde11-5cda-4f7c-8b74-b2fe90b484f5.filesusr.com/ugd/1c8c6c_2027ca20b2a5442e953e20274fe2b72b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/09bcf558-2c73-4903-9c6f-3e7d71c2c883/hp_deskjet_2541_password.pdfIn PDF document text
    • http://juzujodajemafa.rf.gd/wallpaper_samsung_galaxy_m20.pdfIn PDF document text
    • https://089130c0-62ae-4bf1-a93c-656440fe8451.filesusr.com/ugd/738632_45daa66c17a04c02ab169218d4993482.pdf?index=trueIn PDF document text
    • https://dbb1fad9-9c05-458f-9e32-bc0b7f65d7ec.filesusr.com/ugd/451461_90e80e5625df41979769604bc6a924d8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/300cf262-4ea1-4f11-97df-51683d12b719/baxabugiromexuxoxevavurel.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_off0000e680.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE680 5536 bytes
SHA-256: cd8e5b1afaec4d5233048da283a9c029605738e1cfabafa9a0b5ded2882b03fc
font_01_sfnt_off0000f940.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF940 10392 bytes
SHA-256: fa5efccfde81fa3d21f95d30b60a1a9519884bf1305ec4ecd5b1ea565fa08b76

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