Malicious PDF — malware analysis report

Static analysis result for SHA-256 013e6dadc4e4f3c4…

MALICIOUS

PDF

62.7 KB Created: 2020-11-24 14:01:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f4124a8a505279bdf047bbbef6fff8d2 SHA-1: 180b6f4a8cbddd7d0fe320971fef9972c168e88e SHA-256: 013e6dadc4e4f3c4f0dd4e0d506b939da5f36f8003ac557d160ad34795489f40
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for phishing or SEO link farm schemes. The heuristic 'PDF_SEO_LINK_FARM' specifically indicates a mass of external PDF links, suggesting an attempt to drive traffic to other sites. While no scripts were explicitly extracted, the presence of external URIs and the ML classification strongly suggest malicious intent, likely related to phishing or malware distribution via these linked sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=the+culture+map+pdf
    • https://vodoxuzet.weebly.com/uploads/1/3/2/6/132681632/fepik_bebokirunilaja_tedaba_gipel.pdf
    • https://risimukino.weebly.com/uploads/1/3/1/3/131383953/jifaditakogewa.pdf
    • https://cdn-cms.f-static.net/uploads/4451021/normal_5fb9985810b45.pdf
    • https://cdn-cms.f-static.net/uploads/4381294/normal_5f957ca46a5ee.pdf
    • https://sajenaviwabawi.weebly.com/uploads/1/3/4/2/134266368/mobijub.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/zunaporam/80325305132.pdf
    • https://s3.amazonaws.com/dutuzanob/61159552911.pdf
    • https://s3.amazonaws.com/xilasisefi/xojajifavatiwonuvojowu.pdf
    • https://s3.amazonaws.com/nafibanefexex/greek_gods_symbols_of_power.pdf
    • https://s3.amazonaws.com/zinudipir/strategic_group_map_maker.pdf
    • https://s3.amazonaws.com/jarawaxanivu/wazodegujupusem.pdf
    • https://uploads.strikinglycdn.com/files/a3e4af63-5294-445f-be10-27ff0947cbce/xonupefowaxudadarelox.pdf
    • https://s3.amazonaws.com/pizivurapab/new_hip_hop_album_free.pdf
    • https://uploads.strikinglycdn.com/files/e98e3752-50af-4182-a9b9-1ec33b31d11c/19385498636.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b956.bin
db95b1f1c2bb1fedd5180d4a31b56c776ada42da2924eb2226df5bf5d6e232b1
pdf-font-stream PDF embedded font (sfnt) at offset 0xB956 5164 bytes
font_01_sfnt_off0000cabb.bin
dfa1c2ba613cc52f317372b400a11e040c77e24e46772aae91ec16b497594025
pdf-font-stream PDF embedded font (sfnt) at offset 0xCABB 10424 bytes