Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8f2addbef9ea146…

MALICIOUS

PDF

78.3 KB Created: 2021-01-21 15:03:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: aaec3d218044ff9004faccdd306641a7 SHA-1: 7e3a16d329c1ba0b236b8a89a7b1eb353c269089 SHA-256: d8f2addbef9ea146102ef2ebd25282235eab1338a464c780bf70c4f6bff4a3e7
156 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is a phishing document and hosts a large number of external links, likely for SEO manipulation or to host malicious content. The embedded URL points to a site offering a 'clash of clans hack', suggesting a social engineering lure. While no scripts were directly extracted, the PDF structure and external links are indicative of a phishing campaign aiming to trick users into downloading malware or visiting malicious sites.

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://trafffe.ru/123?utm_term=clash+of+clans+hack+android+apk+download+2018 PDF link annotation
    • https://cdn.sqhk.co/gawagunikuw/SHqp0jf/coin_pirates_mod_apk_download_3._5._26.pdfIn PDF document text
    • https://cdn.sqhk.co/gaxokakijefe/Tjjg3hj/zombie_motors.pdfIn PDF document text
    • http://jokebixa.22web.org/command_prompt_complete_reference.pdfIn PDF document text
    • https://pimazapodozem.weebly.com/uploads/1/3/2/8/132814260/8320413.pdfIn PDF document text
    • https://cdn.sqhk.co/malofavu/jiShijb/tenekovojuzofizibe.pdfIn PDF document text
    • https://cdn.sqhk.co/lojosexotak/qLifkjc/make_ice_cream_at_home_in_tamil.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/masevewi/devopefogir.pdfIn PDF document text
    • https://s3.amazonaws.com/woxojuxafopuv/blackpink_forever_young_dance_tutorial_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/pezofut/52560639733.pdfIn PDF document text
    • https://s3.amazonaws.com/fowonaxul/josipoxokowilud.pdfIn PDF document text
    • https://s3.amazonaws.com/wulotugadag/loranakoguxix.pdfIn PDF document text
    • https://s3.amazonaws.com/fekaduvopigab/top_banned_games_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/febopa/kamazujijozizon.pdfIn PDF document text
    • https://s3.amazonaws.com/medaliwifufugel/dusugetafifakefagozugati.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_off0000d911.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD911 5824 bytes
SHA-256: 1f5988a76a719eb5a2dc1cc366463f6ad902ca4cc40770f62ccbdbf370c000a4
font_01_sfnt_off0000ecf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECF5 11980 bytes
SHA-256: 793a992545c50b50b954f233089c75cbe36276105f442809812a829b3ef46765
font_02_sfnt_off00011402.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11402 16312 bytes
SHA-256: aad9bc0f36eadc3314e08670b59090120051e308b357201f134af3d0b781b2b0

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