Malicious PDF — malware analysis report

Static analysis result for SHA-256 67792bd26022936c…

MALICIOUS

PDF

71.0 KB Created: 2021-01-13 21:32:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 8c0dd821b5935405d571a02e13b73b0f SHA-1: 31db0d7bb21211f2beed185255aefcdec687c878 SHA-256: 67792bd26022936c9e5646f8ecb3fc344d50bef3e50d9694acc766f932680eb8
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically pointing to 'trafftec.ru' and a query parameter suggesting a calculator lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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/123?utm_term=russell+index+calculator PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4392651/normal_5fea3b7988630.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411681/normal_5fc73887b0c37.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470826/normal_5fc7505ad073d.pdfIn PDF document text
    • https://site-1187467.mozfiles.com/files/1187467/sperti_fiji_sun_home_tanning_lamp_reviews.pdfIn PDF document text
    • https://nodeseverew.weebly.com/uploads/1/3/5/3/135323512/c5b95ff53a.pdfIn PDF document text
    • https://site-1176860.mozfiles.com/files/1176860/best_instagram_tags_for_street_photography.pdfIn PDF document text
    • https://jimigafekalese.weebly.com/uploads/1/3/1/4/131407537/fefugige.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422145/normal_5f99120543370.pdfIn PDF document text
    • https://site-1176140.mozfiles.com/files/1176140/1971087699.pdfIn PDF document text
    • https://burogoga.weebly.com/uploads/1/3/2/7/132740280/accae4a823f1f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370263/normal_5f88b710d497a.pdfIn PDF document text
    • https://gawufuxawejax.weebly.com/uploads/1/3/1/8/131855981/e869f4a1f7b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000dbea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBEA 5008 bytes
SHA-256: 19f15a473659fa97f4a5c7c7c331f4c5cd0d5403f889af269e2aa4feff6ce93a
font_01_sfnt_off0000ed05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED05 9992 bytes
SHA-256: 9bfbb068c5940b11e3362455a8429e8a458b208129fd8c577c3490ea9ad9723e

Open this report in the interactive analyzer, or submit your own file for analysis.