Malicious PDF — malware analysis report

Static analysis result for SHA-256 df35b98240607acd…

MALICIOUS

PDF

73.8 KB Created: 2021-01-03 03:38:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 797518f901a22181342dfd16fa1875bd SHA-1: 4417e6ce1ebe7711a469e2583715f7a71b0c873e SHA-256: df35b98240607acdd7382878b833b948ae1abebfee0bc48bbbd1763e6e239ab2
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file is classified as malicious, exhibiting characteristics of a phishing or malware distribution lure. It contains numerous external links, many pointing to disposable hosting services, and one prominent URL suggests a fake Google Assistant download. The ML classifier and ClamAV detection strongly indicate malicious intent, likely involving the exploitation of PDF vulnerabilities to redirect users to malicious sites.

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://trafffe.ru/aws?utm_term=google+assistant+apk+android+5.+1.+1 PDF link annotation
    • https://cdn.sqhk.co/tigepukeri/1Mpijha/debt_free_christian_snowball_calculator.pdfIn PDF document text
    • https://jolofoni.weebly.com/uploads/1/3/4/0/134042869/dufopidaranof.pdfIn PDF document text
    • https://bofuvuwowu.weebly.com/uploads/1/3/1/8/131856225/ccdc6.pdfIn PDF document text
    • https://rekizutor.weebly.com/uploads/1/3/0/9/130969391/gofuko.pdfIn PDF document text
    • https://boxemafal.weebly.com/uploads/1/3/3/9/133997404/larugimiri.pdfIn PDF document text
    • https://tedenugimug.weebly.com/uploads/1/3/4/3/134345185/togujalonaku_doket.pdfIn PDF document text
    • https://cdn.sqhk.co/butiluluvuk/yWMXgg3/grand_formula_racing_2019.pdfIn PDF document text
    • https://wutosalix.weebly.com/uploads/1/3/4/6/134635680/824059.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/3c177159-e0f7-4a4b-9b7d-d61a6f78f460/34293520439.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c1289b3-a337-4810-abad-df5c6f885bc9/8787380563.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65201076-54f2-42ff-92d0-2360d25b392c/35977956841.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/517f3c4a-4e43-40e4-b0b7-e8520b648b55/garmin_dash_cam_mini_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08095fb4-e22d-4c46-b189-56a1a62fd7cd/30590859875.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/655e69ea-ff15-423b-b9d4-adda521a12aa/8_polyatomic_ions_quizlet.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_off0000e190.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE190 5428 bytes
SHA-256: 9941a397635ce6f1c60ee2b53c9f85c128a173b0c32140333df36d29ec5da11f
font_01_sfnt_off0000f428.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF428 11252 bytes
SHA-256: f4ce50b798a58270145db79f2d4aa1406520b9dfb7a49ef4ecb8c1d344cc037b

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