Malicious PDF — malware analysis report

Static analysis result for SHA-256 14bcf7d8a4100db6…

MALICIOUS

PDF

66.8 KB Created: 2021-01-08 02:25:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: f82499719be9e7a767123c80ffcc4d04 SHA-1: 7f736938ed40301920593a13e68ae3eeaef4955e SHA-256: 14bcf7d8a4100db622732176643bc628c8fadfed7e811ec67dfb176121b3f45f
214 Risk Score

Malware Insights

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

The sample is a PDF containing a large number of embedded links, with one identified as a malicious redirector. The ML classifier and ClamAV also flagged this file as malicious. The presence of numerous external links suggests an attempt to manipulate search engine results or redirect users to malicious content, likely delivered via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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://gettraff.ru/123?utm_term=15+lb+dumbbells In PDF document text
    • https://cdn-cms.f-static.net/uploads/4378381/normal_5f9e4a12d50f8.pdfIn PDF document text
    • https://renikafajuwigag.weebly.com/uploads/1/3/4/3/134317319/zozepigaxokevi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423431/normal_5fcd3470949d5.pdfIn PDF document text
    • https://gelekale.weebly.com/uploads/1/3/4/2/134266195/lorovudevurox.pdfIn PDF document text
    • https://cdn.sqhk.co/javeduner/vtgejjo/parry_riposte_fencing.pdfIn PDF document text
    • https://rodekimixew.weebly.com/uploads/1/3/4/3/134314341/bomaredoduxukal.pdfIn PDF document text
    • https://cdn.sqhk.co/tinipuded/jcjcjhG/extreme_jet_ski_tour_miami_reviews.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/ef128ace-7b89-458b-86ef-407d2fbe40f3/96291312403.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8fd0dde0-3e0a-4025-8c1e-902f97f2d8e7/80975457871.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4279a3df-141d-44e8-a6ff-70e337c65c05/old_rust_bucket_truck.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f21c33aa-6ec2-464e-a59b-13b83d0ec62e/texas_medicaid_provider_manual_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/051996fe-2acd-463a-8654-f188c5142c79/pesewuxa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9cfaf48-604f-4090-b755-3fe1d8aa3bd7/94718631820.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dec36b65-3868-42a6-b834-cc5334c35fb9/budumataxebezidijuri.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b489c517-e36b-480c-bf4c-007e1a9da60b/17031648266.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_off0000c82d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC82D 4888 bytes
SHA-256: f011c12eaf4b9867c24dae4f221377ca52f6d0257a510396ad3eb439e318b3d2
font_01_sfnt_off0000d8c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8C3 11220 bytes
SHA-256: 409fbb4b9d33c5214c27f6ac3faa59d161fe7d6576517a0377e59d85eba29cc9

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