Malicious PDF — malware analysis report

Static analysis result for SHA-256 eee8b4e00c412cb5…

MALICIOUS

PDF

79.0 KB Created: 2020-12-15 19:49:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 2afcc290a3a0fb85f7052e1c276e3b70 SHA-1: 275f0ddf38fd55a81be87747a7e60e5eef2fca97 SHA-256: eee8b4e00c412cb5bfa41c40ab9c17dc5d92664b4e31dcb7a58c47ad73d249fa
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'traffmen.ru'. ML classification and ClamAV also flagged the file as malicious. While no scripts were extracted, the presence of a malicious URL strongly suggests an attempt to lure the user to a compromised site, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://traffmen.ru/123?utm_term=redefining+our+relationships+by+wendy+o+matik In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368222/normal_5f8ab897cdb27.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444102/normal_5fc1ca777169b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc0f33f2cf09257bd6c4f7e/t/5fd055335347e801a81dd741/1607488819121/94090770509.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5a5b03dfdd95b60f57628/t/5fce6d733c98552880f96a3e/1607363965328/steam_gift_card_email_delivery_with_credit_card.pdfIn PDF document text
    • https://s3.amazonaws.com/levumoduf/mimefizipufalalamakef.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc71b15418d7934ac7538d7/t/5fd6193aacac596b0cb173f4/1607866682879/bemexatimamimobufu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5d25a7848ba205d3a8ee5/t/5fd1a4cd071bbc6880270d05/1607574733686/sawokusaxesewadiz.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc66b1c3398ff7515537f6c/t/5fd00f863308cf4e6fc8cac0/1607470983573/legendary_brawl_stars_apk_download.pdfIn PDF document text
    • https://s3.amazonaws.com/satulibaren/brightsign_hd223_spec_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08f0cf44-3462-4080-b69a-3d62e9cea131/54243047045.pdfIn PDF document text
    • https://s3.amazonaws.com/naramuro/wegubexezoke.pdfIn PDF document text
    • https://s3.amazonaws.com/zidosozawok/fly_fishers_paradise_stream_reports.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_off0000f3e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E5 5860 bytes
SHA-256: 875d856740c61229df2881847e571b98458e0e3c30ba82734ba7a35b3c5e9019
font_01_sfnt_off000107c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107C7 11724 bytes
SHA-256: 3d4fa51b338fa3523f6397627caf277b1cc8ad5dbb4dd9036f8b0bd504b2ecca

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