Malicious PDF — malware analysis report

Static analysis result for SHA-256 19fc795ae7061a6b…

MALICIOUS

PDF

84.8 KB Created: 2021-01-09 08:49:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 67ce2717c1020a925a2dc5e7398efd09 SHA-1: 719742f972a36df0950c45d6f08b1f06dc6518a5 SHA-256: 19fc795ae7061a6bd0085697611800bc7ae623a56987b973b0152a0a6b66d1fa
244 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to disposable domains or redirectors, indicating a link farm or phishing attempt. The presence of a link to 'ggtraff.ru' with a 'utm_term' parameter suggests a potential phishing lure. ClamAV and ML classifiers also flagged this file as malicious, reinforcing the assessment of malicious intent.

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
  • 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.
  • 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?utm_term=age+of+consent+illinois+1990 In PDF document text
    • https://pilogowizimofog.weebly.com/uploads/1/3/4/6/134604263/fedawojipufepuvivopi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423171/normal_5fd77b40594d4.pdfIn PDF document text
    • https://makumanufomogo.weebly.com/uploads/1/3/0/8/130874647/5824792.pdfIn PDF document text
    • https://jaserasozupog.weebly.com/uploads/1/3/1/4/131454215/jofaboke.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386087/normal_5f90e5215b98f.pdfIn PDF document text
    • https://nutajutibasetak.weebly.com/uploads/1/3/4/6/134638930/gapanobaso.pdfIn PDF document text
    • https://sipemesiga.weebly.com/uploads/1/3/4/0/134095973/5999678.pdfIn PDF document text
    • https://ruwelijowabol.weebly.com/uploads/1/3/4/3/134307429/nezozubaz.pdfIn PDF document text
    • https://nelibijejukeli.weebly.com/uploads/1/3/1/4/131437261/2967970.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/megujobemegor/cornell_note_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1fe22ca-e896-476b-8fb9-383810878634/sekenokex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90775085-9fc9-4d50-97d1-25cd2b8b92f7/58308437130.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_off00010e10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E10 5084 bytes
SHA-256: 44c1445fc5b7c60c0a43b074abd87291f37e90abed220af3f68b61d7dd433e04
font_01_sfnt_off00011f8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F8A 10864 bytes
SHA-256: acdfcb44113b87ad5c7d0d0821b637099ac9b77f4acf9746884589f7b80e4d3d

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