Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7eb1e1018df0bac…

MALICIOUS

PDF

65.8 KB Created: 2020-12-25 21:48:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: d2dd2800fac4c831e89ec2aecf09b7f1 SHA-1: eec49b23c336f52edf032727f099ae6dddd5d70f SHA-256: c7eb1e1018df0bac97afb0cfe3f8bbeb5dd7c91184ec2b95c1a0399b6c8b6ce0
244 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and a machine learning classifier, indicating it likely serves as a phishing or redirection lure. It contains a large number of embedded URLs pointing to various disposable hosting services and a known malicious redirector, suggesting an attempt to distribute malware or phish credentials. The document body is heavily obfuscated and unreadable, but the presence of numerous external links strongly suggests a malicious intent to redirect the user to harmful content.

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://cctraff.ru/123?utm_term=code+vein+trading+points+reddit In PDF document text
    • https://sesejeku.weebly.com/uploads/1/3/4/4/134495796/rosuze_pimogeg_jatofoxazep_wetase.pdfIn PDF document text
    • https://cdn.sqhk.co/dujujema/grhcjaf/pibivalikemajasagatoki.pdfIn PDF document text
    • https://vaxajiwozoli.weebly.com/uploads/1/3/1/6/131637631/gilewizewijidu-guzixututepoki-nemefe-digokesaf.pdfIn PDF document text
    • https://nevofegef.weebly.com/uploads/1/3/4/8/134851200/2567352.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459176/normal_5fbc569f94b82.pdfIn PDF document text
    • https://wesuzimowigimeb.weebly.com/uploads/1/3/4/7/134745326/a373b211f49114.pdfIn PDF document text
    • https://niwejeru.weebly.com/uploads/1/3/4/3/134308800/siwejutifub.pdfIn PDF document text
    • https://kasukironumasex.weebly.com/uploads/1/3/1/4/131454791/gupezimagev.pdfIn PDF document text
    • https://votarozoxanobo.weebly.com/uploads/1/3/4/3/134315144/fuvewejuvanivenubaf.pdfIn PDF document text
    • https://gumikixinugud.weebly.com/uploads/1/3/4/8/134864359/2872699.pdfIn PDF document text
    • https://wefejakero.weebly.com/uploads/1/3/0/8/130814310/795995a.pdfIn PDF document text
    • https://pirovosarelivo.weebly.com/uploads/1/3/1/4/131406751/2dd9bcbbcc.pdfIn PDF document text
    • https://cdn.sqhk.co/zokasejiz/KijhcNq/77_delicious_garlic_shrimp_pasta_recipe.pdfIn PDF document text
    • https://moxowikoxub.weebly.com/uploads/1/3/4/0/134096036/4323965.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/49e634a6-1b34-422c-aeae-e65d1adeecb0/dijigikenevo.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_off0000c5e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5E0 5060 bytes
SHA-256: 69e0c40d33ec0632814d4cabf5217c73cb32f6847ad81897531a9a6d7e7572a0
font_01_sfnt_off0000d727.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD727 10396 bytes
SHA-256: 64b61bdf500da5cf4d78ac1f5afd252fbd2b5ec52fa5ac584360d3a5995dd547

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