Malicious PDF — malware analysis report

Static analysis result for SHA-256 e905f5c7d24facfb…

MALICIOUS

PDF

59.8 KB Created: 2021-01-11 22:59:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 8e66f9a58254b9818cc8368f98a574be SHA-1: 722307b7465d053f1639e95f1b3f5921eeb3814b SHA-256: e905f5c7d24facfb1410fe1fd6b9d2601bb64f117e2138bdb923cb301bff8354
156 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_LINK_FARM' suggests the document is designed to host a large number of external links, likely to facilitate phishing or malware distribution. The embedded URL 'https://trafftec.ru/aws?utm_term=run+bts+ep+82+eng+sub' is a primary indicator of this malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://trafftec.ru/aws?utm_term=run+bts+ep+82+eng+sub PDF link annotation
    • https://site-1171990.mozfiles.com/files/1171990/91205973508.pdfIn PDF document text
    • https://site-1174146.mozfiles.com/files/1174146/mandy_the_haunted_doll_movie_parents_guide.pdfIn PDF document text
    • https://site-1171435.mozfiles.com/files/1171435/jalajuzixeni.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495838/normal_5fbeabb43af99.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403418/normal_5fdd3530e64a0.pdfIn PDF document text
    • https://kewekekonuv.weebly.com/uploads/1/3/4/7/134732265/4733848.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413968/normal_5fbb0514ed9d8.pdfIn PDF document text
    • https://site-1194448.mozfiles.com/files/1194448/mr_love_queen_s_choice_character_name.pdfIn PDF document text
    • https://site-1178289.mozfiles.com/files/1178289/rajul.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/vavebufevodutob/hum_hain_bemisal_south_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/jivala/fighter_class_skills_pathfinder.pdfIn PDF document text
    • https://s3.amazonaws.com/jejulurowev/copy_large_files_from_android_to_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/nesolizu.pdfIn PDF document text
    • https://s3.amazonaws.com/gurafoga/50863196440.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_off0000b283.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB283 5124 bytes
SHA-256: 0e15b816a18f63b4ee94d0b4b3a2f026c30718854f2ffb03aef5b60127e7b739
font_01_sfnt_off0000c409.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC409 8916 bytes
SHA-256: 7473705cc71e2617515096195aa355c4cd2d79c1d6eeb290e6e5f300f0bcab7c

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