Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa4310eae04869a4…

MALICIOUS

PDF

74.0 KB Created: 2021-03-20 12:06:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: cde3b5d2211685c756cd1ee2764909b6 SHA-1: 54879e31a9d9bd72ab4306ff0a35fdb0c0c9be06 SHA-256: fa4310eae04869a421809da5f0f052eae4465ad6accaf29ed45a721209380465
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • 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://druttle.ru/wix?keyword=discord+mobile+notifications+not+showing PDF link annotation
    • https://fegajasun.weebly.com/uploads/1/3/4/5/134502742/cb3370964b.pdfIn PDF document text
    • https://cdn.sqhk.co/fipimomozuk/jgNzlTN/govonubudimobijiton.pdfIn PDF document text
    • https://xobijuveja.weebly.com/uploads/1/3/1/6/131606615/bozim.pdfIn PDF document text
    • https://sadewirezetif.weebly.com/uploads/1/3/4/3/134318623/sisebok.pdfIn PDF document text
    • http://portkamesto.site/lutofuvijusemivotavwtl2v.pdfIn PDF document text
    • https://cdn.sqhk.co/xesoralo/j1ijr9n/80874865461.pdfIn PDF document text
    • https://cdn.sqhk.co/kisasizaro/JhfxgdL/flik_flak_football.pdfIn PDF document text
    • http://cethq.xyz/13936628241hjazi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zevuketeno.rf.gd/zurugopesu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52a0b200-04f3-44f3-a42d-5a3fdd0f9bd6/examples_of_using_critical_thinking_in_the_workplace.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be1a1c53-1ebd-4e13-95e7-a3b10f442c5b/how_do_i_register_my_motorola_cordless_phone_to_base.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17728372-7af0-4fe0-96bb-4702337f5d8b/xovodez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28205e2e-47b9-4d24-9060-f6c7aa134839/what_is_the_difference_between_so_and_because.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c66a9954-9960-4a07-9445-c3d2c09c96aa/fanepeloxur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9792910c-9947-4c3c-a985-0518b622a3bf/89831151323.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c644c23b-d62e-4317-8c54-b818993fb39f/black_criminal_defense_attorney_in_houston_tx.pdfIn PDF document text
    • http://katetagozu.epizy.com/vasowoxisaxirapobenewuxi.pdfIn PDF document text
    • http://tuvebiz.rf.gd/domemenirisepipabu.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e29e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE29E 5668 bytes
SHA-256: 6f6aeff9d2c59ceaa93ebdb241d9c8ac33c9fbaee51bd386beb86d400cd36ae1
font_01_sfnt_off0000f5ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5CE 10756 bytes
SHA-256: a9991b72002394502988ad82dfde375c0bf49da881bf0a0ea58d80824fa9fd91

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