Malicious PDF — malware analysis report

Static analysis result for SHA-256 04cb002e1dc830cb…

MALICIOUS

PDF

63.3 KB Created: 2020-11-28 08:34:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 70f5ba39462d1cb67fb0b103b8aeeb25 SHA-1: b46cf528c520ba20fde9f7d40d97c59732e0e8a5 SHA-256: 04cb002e1dc830cbf9fe2139ed51192451802ed1f115d58fbb6e088ce490832e
252 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple links to external websites, with a critical heuristic firing for malicious redirector infrastructure. The presence of a 'download button' lure and ClamAV detection further supports a malicious intent. While no scripts were directly extracted, the PDF structure and embedded links suggest it's designed to redirect users to potentially malicious content, possibly for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/aws?utm_term=cid+full+episode+mp4+free In PDF document text
    • https://vesasasafej.weebly.com/uploads/1/3/4/7/134758359/8484238.pdfIn PDF document text
    • https://javumegibevi.weebly.com/uploads/1/3/4/6/134634398/703605.pdfIn PDF document text
    • https://tatogupuragafa.weebly.com/uploads/1/3/4/0/134096405/6f3d8c63.pdfIn PDF document text
    • https://sabijodamibig.weebly.com/uploads/1/3/0/7/130775907/a31b64.pdfIn PDF document text
    • https://bolumuratojepo.weebly.com/uploads/1/3/4/7/134749128/03f7f9f.pdfIn PDF document text
    • https://nofabirudop.weebly.com/uploads/1/3/4/4/134455392/ruzumifidanu-polupurovonobed-razop.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/jukezeluf/cain_and_abel_wifi_password_hacking.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77fc6446-1f36-4781-afbc-9b88fd014577/85035392549.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/139f49f5-26f6-4fd7-9e43-8b56555d292f/koraja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec7830ae-33c0-4272-89cf-b628a75459a8/salam_indir_euro_truck_simulator.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9bccfae-3a00-413d-86df-6b98536b8e13/xuxirimimatibiziban.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef2ecdd8-b9c2-4d60-9436-a2b4444d5432/8514803997.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e7b712c-f5cb-431f-973d-40e65d8cfa15/ffxiv_flower_pot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d34de02-6aa9-4a2e-b542-3da260fba0a5/catching_fire_full_movie_free_online.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_off0000ba70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA70 4968 bytes
SHA-256: 4e0ff10b59e2641fdcbed2d936971e3b6578e41aeaaf9ea150b217ef394104cc
font_01_sfnt_off0000cb44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB44 11084 bytes
SHA-256: 4b3824ec659c0129c4e8722d019ceda710bd0e0b39f78e590cbf9eec874843c6

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