Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea7213ef04dacdca…

MALICIOUS

PDF

66.2 KB Created: 2020-11-12 21:37:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 922bd299925cd4a2e5212cc573bbed1c SHA-1: 5d27fa03a113cd5e374ed4b11b91ae804d02ba47 SHA-256: ea7213ef04dacdca7b39ca1a9464a4aae76aca82c4119ca049d1251bd7dd4d00
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9997

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 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.
  • 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://trafficel.ru/aws?utm_term=valiant+hearts+the+great+war+android PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4383574/normal_5f8ed24bd330a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403415/normal_5f94dafa4c118.pdfIn PDF document text
    • https://pepotoxuxomupav.weebly.com/uploads/1/3/1/4/131483830/maxuwuxip.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404733/normal_5f9c9208239af.pdfIn PDF document text
    • https://sabidodavo.weebly.com/uploads/1/3/1/4/131408103/6112384.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393035/normal_5fa3afc439e2d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/632124ce-7e13-42ae-875d-c9da45ec0e98/44439638140.pdfIn PDF document text
    • https://s3.amazonaws.com/bisazabe/power_cord_for_toshiba_laptop_satellite_l505.pdfIn PDF document text
    • https://s3.amazonaws.com/davawina/discovering_computers_2016_download.pdfIn PDF document text
    • https://s3.amazonaws.com/janodojivi/bostitch_air_compressor_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a14bc5c-51ec-4110-bc12-7ba79fa9cda6/xixovojowuxapolugedulesaj.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b80d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB80D 4932 bytes
SHA-256: ac25b6f2c6582118266c8860bc20ae702aece4ce3e336e80f29f3493f52c5939
font_01_sfnt_off0000c8d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8D2 10996 bytes
SHA-256: 032581f191d786b0571f0608ce943b77e8d92e04a339e4cab1457cbd31252f37
font_02_sfnt_off0000ee40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE40 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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