Malicious PDF — malware analysis report

Static analysis result for SHA-256 56592548aa8d24ac…

MALICIOUS

PDF

77.7 KB Created: 2020-12-26 10:41:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 448116d81af39e51ef70043ecf554029 SHA-1: eeb26703d84edacc685617449be0b05495ad6122 SHA-256: 56592548aa8d24acfe6c673c9ffe4d33088aeec5513cfc93d911931abbcdcb05
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is identified as malicious by multiple heuristics, including a critical PDF link farm detection and ClamAV. The presence of an external URI pointing to 'trafficel.ru' suggests an attempt to redirect users to a potentially malicious site. While no scripts were explicitly extracted, the PDF structure and link farm heuristic indicate a likely phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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/123?utm_term=at%2526t+center+seating+chart PDF link annotation
    • https://cdn.sqhk.co/weteroliwo/2hrgf3v/bumijibaxuxedozevajureliz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392472/normal_5f923083430a3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412575/normal_5fcad6faa87e3.pdfIn PDF document text
    • https://cdn.sqhk.co/duwewofowus/dhevgde/friend_finder_networks_data_breach.pdfIn PDF document text
    • https://pugojowu.weebly.com/uploads/1/3/4/3/134334477/lusuviruvuvuze-gagun.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/xalexojaxipud/91831486131.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8281aad-1c82-4f74-bcb3-08c945cbcbdb/4447094171.pdfIn PDF document text
    • https://s3.amazonaws.com/dapekufoxiraku/back_arrow_icon_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/nodetuxapabara/dragon_ball_z_super_android_13_japanese.pdfIn PDF document text
    • https://s3.amazonaws.com/gurowozenupifi/78556963470.pdfIn PDF document text
    • https://s3.amazonaws.com/juliziwojatige/love_story_games_offline_free.pdfIn PDF document text
    • https://s3.amazonaws.com/dotivaf/osrs_fletching_profit_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/lebejos/72536467624.pdfIn PDF document text
    • https://s3.amazonaws.com/wexoteluwag/lusajinijeputidovak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d776e95-5229-4021-a792-10354c826ea8/zitubesosujogivek.pdfIn PDF document text
    • https://s3.amazonaws.com/kofabube/30755763415.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1B0 4144 bytes
SHA-256: 7d3a719a45dbe4bb54c9265ff72a0838cbe1c47c5387598d1022aa94f12bb21a
font_01_sfnt_off0000efd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFD3 10712 bytes
SHA-256: e15480689fbb2aba686591e3976f663e8eafea0dce98485a8114284b762ac055
font_02_sfnt_off00011471.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11471 16204 bytes
SHA-256: 31aa257675234f953cb39254c73a0c002637764ec2691c470e0912636c3685cf

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