Malicious PDF — malware analysis report

Static analysis result for SHA-256 df1ae1b4efe8db3d…

MALICIOUS

PDF

68.6 KB Created: 2020-11-13 10:34:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 50317dadf50d1ef19deee467e7a172e5 SHA-1: d261636f2a584f5fe55fcd868e0fa8dbce0420fa SHA-256: df1ae1b4efe8db3d9942f95a954a15c207036e33d08e6ac7670c20a2f553f958
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9998

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 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://trafffe.ru/123?utm_term=modern+automotive+technology+james+e+duffy+pdf PDF link annotation
    • https://mabanopovofed.weebly.com/uploads/1/3/1/4/131453130/945487.pdfIn PDF document text
    • https://pidadilux.weebly.com/uploads/1/3/4/6/134666204/sesakaf.pdfIn PDF document text
    • https://konozobit.weebly.com/uploads/1/3/4/4/134456152/2621280.pdfIn PDF document text
    • https://jarapitoxedomel.weebly.com/uploads/1/3/1/4/131437170/1486329.pdfIn PDF document text
    • https://buxiniti.weebly.com/uploads/1/3/4/3/134309366/6381070.pdfIn PDF document text
    • https://wekubuzebebam.weebly.com/uploads/1/3/0/7/130739705/3101232.pdfIn PDF document text
    • https://xemojunaxumig.weebly.com/uploads/1/3/4/2/134265853/9308677.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/lurutopobi/sisd_calendar_2019_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cca94db8-944a-49fb-b6f7-01b0c017022f/dream_league_hileli_indir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f83020c-c03c-45fe-a6f2-c553d314c30c/76525249568.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f9d999c-c907-48c0-b0ed-c901d5843a7e/lbrands_aces_work_schedule.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0864ccb-aa02-4d5b-a822-fe467401290c/62237522478.pdfIn PDF document text
    • https://s3.amazonaws.com/rotowan/60714498722.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_off0000cd17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD17 5812 bytes
SHA-256: b85fbff27ec921f35af2b4dff890e44dbdfd4a042453466cc0b6e121325316d7
font_01_sfnt_off0000e0df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0DF 10736 bytes
SHA-256: 0b2a4470f7f8be9a7a3ee15efbb94ab2e3fcb42018c348baa0f41b586c990a8b

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