Malicious PDF — malware analysis report

Static analysis result for SHA-256 a22d8ba7070f5449…

MALICIOUS

PDF

71.5 KB Created: 2020-11-24 03:57:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aff97ddb766504d88308730183459046 SHA-1: d2846144b6ede5c9fe4aa80419900d7e31900f20 SHA-256: a22d8ba7070f54490e78d43a37990f18a7ddf53298bf17323e03f7610313e34d
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to Weebly-hosted PDF files, suggesting a link farm or redirection scheme. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to trick users into downloading further content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/strik?utm_term=dhoom+2+hindi+full+movie+download+300mb
    • https://jupavovol.weebly.com/uploads/1/3/4/3/134314217/bovavamorav.pdf
    • https://fodibiwowi.weebly.com/uploads/1/3/4/4/134479135/xexoni.pdf
    • https://jurefuzosapob.weebly.com/uploads/1/3/4/9/134901670/bumixo.pdf
    • https://sowameneritela.weebly.com/uploads/1/3/0/7/130775755/cfae879e9778.pdf
    • https://xexezakofiwojuv.weebly.com/uploads/1/3/4/3/134372147/92a532.pdf
    • https://rumeravovavupol.weebly.com/uploads/1/3/4/6/134619367/780775.pdf
    • https://xinejusitap.weebly.com/uploads/1/3/4/6/134630468/wezejelisenekowulu.pdf
    • https://cdn-cms.f-static.net/uploads/4485457/normal_5fb703573247e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/kavitokolezub/mijezipani.pdf
    • https://s3.amazonaws.com/bifamomove/season_5_of_girlfriends_guide_to_divorce.pdf
    • https://s3.amazonaws.com/penale/34696614806.pdf
    • https://uploads.strikinglycdn.com/files/2dd325b2-0ea3-456c-9635-9b48c9341495/sports_heads_football_championship_unblocked_games.pdf
    • https://s3.amazonaws.com/potofaw/38731052476.pdf
    • https://uploads.strikinglycdn.com/files/bae0b82b-8ba9-4734-a437-6b1079ef7e2a/xikisina.pdf
    • https://uploads.strikinglycdn.com/files/6079e978-4bbe-427d-96cf-ad1e09ab4b43/blinding_light_of_destiny_guide.pdf
    • https://uploads.strikinglycdn.com/files/c48c3e98-cf89-47ac-9122-8bc541184b33/15656669272.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d9af.bin
91b22995e7dc4421387bb0d21f5a52d7883b158f30f0e5694503977482456469
pdf-font-stream PDF embedded font (sfnt) at offset 0xD9AF 5604 bytes
font_01_sfnt_off0000ecb7.bin
6ef7f6ff28a20f4f4d9bdbcfbc0ab26d120eaa9e1f05a130bda6cb832071b2cb
pdf-font-stream PDF embedded font (sfnt) at offset 0xECB7 10808 bytes