Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce686f88a8a322f8…

MALICIOUS

PDF

53.1 KB Created: 2020-11-08 03:15:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 749c8469aeba24633d849352d610c0da SHA-1: 5ba00b9d8cfdecccab59016a2c1473b3160b0222 SHA-256: ce686f88a8a322f803e5780471fb59bf1ea13f69c2c009dd8043150754b34a0f
204 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded links, with one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to a 'Honda 125cc dirt bike 2020' and a URL, suggesting a lure to a scam or phishing site. The presence of numerous links to external PDFs, many hosted on disposable domains, indicates a link farm designed to distribute malicious content or traffic.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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?keyword=honda+125cc+dirt+bike+2020 In PDF document text
    • https://pevugubak.weebly.com/uploads/1/3/2/7/132740457/e860179995909.pdfIn PDF document text
    • https://wepugimi.weebly.com/uploads/1/3/1/0/131070973/xenojefomil.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://tuxabavijig.files.wordpress.com/2020/11/37940387668.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f9db64b-6881-4d7a-93aa-2040e7608b2a/74991710302.pdfIn PDF document text
    • https://rudasevubut.files.wordpress.com/2020/11/bekivanifelako.pdfIn PDF document text
    • https://wumuribar.files.wordpress.com/2020/11/rifudimifezipeberofotesi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b2016c3-0776-4c73-be5f-7fff77d91137/13021915917.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/5052686228.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c91de57f-cc70-4887-baed-9379c2dfc278/wabefof.pdfIn PDF document text
    • https://fefitaw.files.wordpress.com/2020/11/64939725781.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ef84d4d-c1c2-41c6-86af-15f75daa82e5/intermatic_malibu_ml200rt.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9477647c-2459-4b4e-abc5-af52a5a7c2a1/ronepukawutekologojojano.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_off00009097.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9097 5340 bytes
SHA-256: 65d883ed8566bfef6ead23189756518d6954ef454851186f992cde212b78c574
font_01_sfnt_off0000a2d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA2D4 10892 bytes
SHA-256: a0ade7f11fe599999df09105f27acf94fde27e34301ade6862813c425b3e32e1

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