Malicious PDF — malware analysis report

Static analysis result for SHA-256 a346bbc1a3d6e462…

MALICIOUS

PDF

69.9 KB Created: 2020-11-26 18:54:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: f8893dc7728bd8a1e67564423a998df1 SHA-1: e6b3a8a3cdb22cff20c3bd9077bb169607334f40 SHA-256: a346bbc1a3d6e4625facdedb771978082107119764eb11af4d753edfa3982ace
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were directly extracted, the presence of external URIs and the nature of the heuristics point towards a malicious document designed to redirect users to harmful content.

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
  • 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.
  • AcroForm button with action trigger low PDF_ACROFORM_BUTTON
    PDF contains a /Btn form field together with a SubmitForm/URI/Launch/JS trigger — this is the building block of fake 'Download' or 'Open' button overlays used in PDF phishing lures
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffking.ru/123?utm_term=roblox+scp+security+department PDF link annotation
    • https://gokipeko.weebly.com/uploads/1/3/4/3/134351508/775594.pdfIn PDF document text
    • https://sawinabepetejex.weebly.com/uploads/1/3/4/7/134714359/7349e3d.pdfIn PDF document text
    • https://bogemokized.weebly.com/uploads/1/3/4/3/134386998/badewawafe.pdfIn PDF document text
    • https://guxesawaxogego.weebly.com/uploads/1/3/4/3/134314991/01f58ed.pdfIn PDF document text
    • https://relugudikovok.weebly.com/uploads/1/3/4/2/134265752/8896748.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449987/normal_5f9fd86bb5a40.pdfIn PDF document text
    • https://moxoviwepikiwu.weebly.com/uploads/1/3/2/8/132814726/xibirudixazetuto.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/a40b52fa-288c-4005-b7c5-a08b98dac152/jagewa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66048966-4300-4a63-8493-0463ad5f49d2/35704518874.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35c2c859-6513-4e93-ac40-1c80c2f9ec16/62472714259.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d42ae359-b614-4770-b7dd-25dd8979b218/halo_2_pc_download_highly_compressed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d99d1dc-1343-4c6a-a327-c7ab54230d41/elizabeth_gilbert_big_magic.pdfIn PDF document text
    • https://s3.amazonaws.com/xubifupi/back_to_the_future_the_game_apk.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_off0000d2cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2CC 5536 bytes
SHA-256: 3c3fb15c5f894cf32cba050f8ebefbcae0a05f67698998002dbe8fcf23293fbb
font_01_sfnt_off0000e598.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE598 10748 bytes
SHA-256: 331616922c01ab52d45d09e9e407456337ebfe629bf2a97662375eacc8c94b94

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