Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7f55604845085d8…

MALICIOUS

PDF

78.0 KB Created: 2020-12-26 11:29:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 02af4849ab88b00bdbc2328c3371af6b SHA-1: e4df2215477007e0e869a2a5acd72220077e12ed SHA-256: d7f55604845085d8782be50ef20ebf269f700f9071751f247579790c61f88c77
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 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafftec.ru/strik?utm_term=sage+the+gemini+height PDF link annotation
    • https://warevinigipa.weebly.com/uploads/1/3/4/8/134898994/1380397.pdfIn PDF document text
    • https://cdn.sqhk.co/bozadukopufu/d2RkigJ/xesonigibowapibosalibab.pdfIn PDF document text
    • https://babinekisifuve.weebly.com/uploads/1/3/2/6/132696104/relavexi.pdfIn PDF document text
    • https://wefamojugibe.weebly.com/uploads/1/3/1/1/131164519/pafotudatarepekuk.pdfIn PDF document text
    • https://gejewesogoj.weebly.com/uploads/1/3/4/6/134612034/1d77057.pdfIn PDF document text
    • https://jewajufigojoxi.weebly.com/uploads/1/3/1/4/131438211/eb3415.pdfIn PDF document text
    • https://boxatikavizag.weebly.com/uploads/1/3/4/6/134680825/vizegutof.pdfIn PDF document text
    • https://cdn.sqhk.co/jamolipa/ibghYjg/gagurakufixijusivabeja.pdfIn PDF document text
    • https://jaloteke.weebly.com/uploads/1/3/4/0/134096083/jowudarikatovaminat.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/d08b4355-fd89-496d-bb3a-92073b6ad94a/topologias_de_red_anillo.pdfIn PDF document text
    • https://s3.amazonaws.com/faxaxos/99287468652.pdfIn PDF document text
    • https://s3.amazonaws.com/ximupuv/old_neighborhood_restaurant_in_arvada_colo.pdfIn PDF document text
    • https://s3.amazonaws.com/wuwabobujasivor/jujegeporamu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c21aa80-805b-4f1f-bc13-48d3d9f50220/78981893335.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBED 4896 bytes
SHA-256: 36e9ddfa0642eed3764c65ee6a6b3624ef27e699662d8659c9ef1190b45b549d
font_01_sfnt_off0000ec73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC73 11568 bytes
SHA-256: 13961ca3f90dd58d2d109f1d9ab678a2587cfbdfb239cce702dbaf85dafad529
font_02_sfnt_off00011376.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11376 16424 bytes
SHA-256: 783ba6cdd3dfe49b9a3f478cc45eb9bbd30d0f34939f5d2f2060c211cbc4e2b2

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