Malicious PDF — malware analysis report

Static analysis result for SHA-256 b78edc399bd0b9b7…

MALICIOUS

PDF

94.0 KB Created: 2021-01-06 10:15:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: c990fa6fe512f360770918fc89c14116 SHA-1: 7ef383b3c72d267c68ac398840be507c5e8d0a98 SHA-256: b78edc399bd0b9b765fd9c3f16909d02eb3eb32cdaf575d8bc06701b6c746607
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 'https://gettraff.ru/123?utm_term=kingdom+hearts+2+final+mix+synthesis+guide'. This indicates the document is designed to lure users to a potentially malicious website. The ML classifier also strongly flagged this PDF as malicious, supporting the phishing or malware distribution intent. No scripts were extracted, but the embedded URL is sufficient evidence of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://gettraff.ru/123?utm_term=kingdom+hearts+2+final+mix+synthesis+guide In PDF document text
    • https://cdn.sqhk.co/bulamije/vghjPvS/ivan_the_terrible_facts_ohio.pdfIn PDF document text
    • https://cdn.sqhk.co/bovokolel/6MhcbvT/mekupop.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452624/normal_5ff296115f2b9.pdfIn PDF document text
    • https://cdn.sqhk.co/sikibeve/ahbighi/26491105521.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480414/normal_5fd6a0a6b2a70.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467032/normal_5fea4383d4036.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490524/normal_5fb81b7c807f2.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/banula/centering_and_shuttering_form_work.pdfIn PDF document text
    • https://s3.amazonaws.com/dejolavubukugeb/kugixesusijunelurobut.pdfIn PDF document text
    • https://s3.amazonaws.com/bevarolimesale/lujasumenokozasefuzi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f946971e-06d7-4f86-9d07-b6c70a853055/craftsman_6.5_hp_21_inch_lawn_mower_manual.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_off00012eba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EBA 5592 bytes
SHA-256: f74b50775e1b17b4afe7517befba640fc91554219cd4d5a8e36a9e3833b88117
font_01_sfnt_off000141b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141B1 12268 bytes
SHA-256: 9364ff281e9337f48959f43835dd2fb51cda04bf87ea4baeef44384c75ce7851