Malicious PDF — malware analysis report

Static analysis result for SHA-256 0077e4bacbcfcdac…

MALICIOUS

PDF

69.9 KB Created: 2020-11-24 10:53:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 4aaf835d31dc4c066d32215ffb0a7766 SHA-1: 74b6bd26bd1b03eb72496294776c00d472021d46 SHA-256: 0077e4bacbcfcdaca695a9e08fb76973150244dcba85bd3d21a4aea75c0a5207
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of external links, many of which point to known malicious redirectors or disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. The embedded links suggest an attempt to lure users to external malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/strik?utm_term=brewing+classic+styles In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366384/normal_5f8722932e1c6.pdfIn PDF document text
    • https://fisabovetusita.weebly.com/uploads/1/3/4/5/134597566/titezamomawod.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/baputedev.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/vifotatilaw.pdfIn PDF document text
    • https://fafugugopogewip.weebly.com/uploads/1/3/4/4/134464831/9876559.pdfIn PDF document text
    • https://kibodowusi.weebly.com/uploads/1/3/4/5/134588916/wuxefivemofituvuda.pdfIn PDF document text
    • https://luwamagol.weebly.com/uploads/1/3/4/3/134375262/5252647.pdfIn PDF document text
    • https://fufivivol.weebly.com/uploads/1/3/0/8/130873849/zafeb-tikugi-tuvopafi.pdfIn PDF document text
    • https://mupibidegupek.weebly.com/uploads/1/3/0/8/130874042/vafatitemazuk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/c4c2b36c-616e-4537-b8e6-ded79facc352/don_t_be_cruel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd5b8f97-0e24-4591-8316-790d46564029/jobek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c78ff77c-8793-4f2a-8fa0-e4ebe6c4559c/35423849404.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6798e793-482e-43f8-964b-a7b081fa7bfe/administracion_de_la_cadena_de_suministro_chopra.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43f88e69-d5b6-42c6-a916-5c6d822c787e/zakusodurubadi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9f680c3-5172-4a0b-8c4f-16b7a886a2af/9729807315.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c9f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9F2 4888 bytes
SHA-256: ff019effafe1bfaa351aca4b81052e1fcaa369b936512e18e4694ec1ab3e1d98
font_01_sfnt_off0000daa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAA9 10028 bytes
SHA-256: cb77169d5f7a2ad37c4eb60bcd0c5d4923264426640d420777d2e5308cbe13d5
font_02_sfnt_off0000fcc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCC2 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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