Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e7fd8dc6f0af7b4…

MALICIOUS

PDF

56.2 KB Created: 2020-11-08 07:34:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: a95d230fb839859bb160f5fc108f16e6 SHA-1: db3890a1b0397407341f2bfd9b515876f4793d63 SHA-256: 7e7fd8dc6f0af7b4629b8c1c3fd6a7abbcc13a8ac0c7901c4316228a5e9ca772
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains a large number of external links, many hosted on disposable domains, characteristic of a link farm or SEO poisoning campaign. The document body presents itself as a "Simmons trail camera manual" to lure users, while the embedded URL `https://trafficel.ru/123?keyword=simmons+trail+camera+manual+119504c` is likely the primary malicious destination. No scripts were extracted, but the PDF structure and numerous external links suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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://trafficel.ru/123?keyword=simmons+trail+camera+manual+119504c PDF link annotation
    • https://kukefilatisila.weebly.com/uploads/1/3/4/4/134498126/dejex.pdfIn PDF document text
    • https://xekadefu.weebly.com/uploads/1/3/4/5/134597434/xesaberopoke.pdfIn PDF document text
    • https://jabezenenadako.weebly.com/uploads/1/3/4/2/134234778/rugibutax_wivifufitar_zupinuvi_mobejozasudo.pdfIn PDF document text
    • https://nuzilemuf.weebly.com/uploads/1/3/4/4/134479477/4489596.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388596/normal_5f900b34a65ab.pdfIn PDF document text
    • https://nitetezelimon.weebly.com/uploads/1/3/1/4/131438651/papozamijul.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://potijovow.files.wordpress.com/2020/11/navy_chloroform_shoes.pdfIn PDF document text
    • https://pokagiriti.files.wordpress.com/2020/11/54563046139.pdfIn PDF document text
    • https://limizomufepi.files.wordpress.com/2020/11/96711818679.pdfIn PDF document text
    • https://rebusudes.files.wordpress.com/2020/11/31763742790.pdfIn PDF document text
    • https://vakonowar.files.wordpress.com/2020/11/nijinifixelev.pdfIn PDF document text
    • https://s3.amazonaws.com/dejolavubukugeb/lizetogobitijusevifutezeg.pdfIn PDF document text
    • https://vobinujo.files.wordpress.com/2020/11/filosevopavoto.pdfIn PDF document text
    • https://poxijotavix.files.wordpress.com/2020/11/phet_balancing_chemical_equations_simulation_answer_key.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_off0000982e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x982E 5608 bytes
SHA-256: 8ef64f7cb5737b587550d5d2ee55a3b2b2d72a870954a148acee8d8bdd3d8ba0
font_01_sfnt_off0000ab2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB2D 12720 bytes
SHA-256: e90552792951862517f92f4c3361826ce00b94e1aaadef682b61b28f071cc638

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