Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a1e3b8264a1609e…

MALICIOUS

PDF

69.9 KB Created: 2021-01-10 19:53:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: b94c185cb531482535493b78a0f8a9e0 SHA-1: ac5c77083c714b3705d2beb53f3aaebcc095454d SHA-256: 5a1e3b8264a1609ecdf509ee41cae5494a15400d340068053592e8052b554017
154 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical alert for linking to known malicious redirector infrastructure and a high-confidence ML classification. The embedded URL, https://ggtraff.ru/123?utm_term=usmc+mcc+code+manual, is the primary indicator of malicious intent, likely serving as a lure to a phishing or malware distribution site. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://ggtraff.ru/123?utm_term=usmc+mcc+code+manual In PDF document text
    • https://cdn.sqhk.co/vonixilavot/hnjhShc/74060125398.pdfIn PDF document text
    • https://dutumujupag.weebly.com/uploads/1/3/1/3/131383630/5851968.pdfIn PDF document text
    • https://cdn.sqhk.co/nezerozara/dijiahg/womofesogisesuxovitijo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384825/normal_5f93db21f1d7d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380210/normal_5ff286e5c416a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453115/normal_5fb2d2396a696.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384026/normal_5fd39b67bf291.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/zaxuledo/dinoremafefarugeka.pdfIn PDF document text
    • https://s3.amazonaws.com/sulasatevirexo/65947106922.pdfIn PDF document text
    • https://s3.amazonaws.com/zufaxepixiguxax/kled_build_guide_aram.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_off0000d5fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5FD 4980 bytes
SHA-256: 0df75c212cabdf5ceff1aca4d945e2dc72e0ecee23d93510be37c862d8d09cbb
font_01_sfnt_off0000e6d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6D9 10752 bytes
SHA-256: 583d5cffb20bab233a07a8909ec03fd8a1f9eff848514a082ed949076e025aac