Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3b8b366e48daaf8…

MALICIOUS

PDF

77.0 KB Created: 2020-12-22 08:02:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 63484ffc7df1615a4923b50605ab4654 SHA-1: 9980e10e0f765305dedc857b86dc7d2794b13ae7 SHA-256: a3b8b366e48daaf8cbf9a5529780d66e80a63e991d1a7a48d9da7e43b15a0983
96 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 a machine learning classifier and ClamAV, with the ClamAV detection name 'Pdf.Phishing.Trojan'. An external URI pointing to 'trafficel.ru' was extracted, suggesting a phishing or malicious download attempt. While no scripts were explicitly extracted, the PDF structure and the nature of the detection indicate a likely phishing lure disguised as a utility.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • 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=auto+photo+background+remover+apk PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zatazewoz/whatsapp_status_saver_apk4fun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/409a624a-4e9f-4f00-af70-71411eb11ca1/best_buy_mayfair_mall.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/waviwa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4caaad97-79f2-46c0-aa10-6ce8604a69cd/shrek_full_movie_free.pdfIn PDF document text
    • https://s3.amazonaws.com/kefefetafij/lopugilikukadosax.pdfIn PDF document text
    • https://s3.amazonaws.com/watajive/71228360189.pdfIn PDF document text
    • https://s3.amazonaws.com/vabemavuputenif/28632425870.pdfIn PDF document text
    • https://s3.amazonaws.com/kezemiradigu/40047579204.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0ba3b0a2757459be1f9cb/t/5fc1585c9d79364840bfa1c5/1606506594710/the_long_walk_home_questions_and_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70ded3fc-e237-4bba-a19b-03852fdab76c/64095209284.pdfIn PDF document text
    • https://s3.amazonaws.com/mizeteb/degepobebutapodogog.pdfIn PDF document text
    • https://s3.amazonaws.com/gomaxod/48757667109.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagoba/83653640893.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/xuzowikumozesitegi.pdfIn PDF document text
    • https://s3.amazonaws.com/vinivuxo/72276201558.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ccc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCC3 3120 bytes
SHA-256: 16a0685b1af8f7ff3286410c82d065b2ef9dd16f5cc5e004aadb0dd239daad33
font_01_sfnt_off0000d7f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7F6 5528 bytes
SHA-256: f49dbead690a42dc558664efe9b5f1b1c7934f3ba6edc5f3275f73cbd3e5b3fb
font_02_sfnt_off0000ea9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA9A 11120 bytes
SHA-256: b60f20216559f5a3776828fff0f36ab116cdcfccd008915fe7dabc791905ee4b
font_03_sfnt_off000110b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110B7 16308 bytes
SHA-256: 8a2751ccb5a69797f17683f10534feb4307371489dac03ed3f406d638618f769

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