Malicious PDF — malware analysis report

Static analysis result for SHA-256 068af7049191c286…

MALICIOUS

PDF

70.3 KB Created: 2020-12-24 08:15:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: fc4a98b543df718573455dcaf32fb44c SHA-1: 979e097a3f0350ed669ec93f92de401be5b59ab1 SHA-256: 068af7049191c286a208e96df9670c71528a7609c7689632259f73ea2698c56b
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It functions as a link farm, directing users to numerous external URLs, including one that appears to be a tracking link. The document body, though heavily obfuscated, contains references to 'Asteroid 52768 tracking' and 'wkhtmltopdf', suggesting a lure to potentially malicious content hosted on external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafftec.ru/strik?utm_term=asteroid+52768+tracking PDF link annotation
    • https://vajugape.weebly.com/uploads/1/3/4/7/134767319/5d65fc4c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407314/normal_5fb2d833ea234.pdfIn PDF document text
    • https://pamoxoxose.weebly.com/uploads/1/3/4/6/134656592/jamafagudanagi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380692/normal_5f9e25a1c2201.pdfIn PDF document text
    • https://ruwalabipuges.weebly.com/uploads/1/3/4/4/134465281/7741be6b0825.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375889/normal_5fc0ada4076df.pdfIn PDF document text
    • https://nuvomananakoleg.weebly.com/uploads/1/3/1/4/131453817/a6e018.pdfIn PDF document text
    • https://buwulikifem.weebly.com/uploads/1/3/4/5/134583505/pezavi.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/580045e9-c2cc-45de-adbf-ca7469f2d369/todileruwaxipiva.pdfIn PDF document text
    • https://s3.amazonaws.com/bezutu/aluminum_sheet_metal_home_depot_canada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e87fb197-30f5-4b98-9d1a-8301c89e92af/hd_movies_online_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/niporofez/new_shayari_image_2018.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_off0000d372.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD372 5812 bytes
SHA-256: f83d4803042f02ea0941e04979cb2dd4705356b35d256e7c1bec10e26212a079
font_01_sfnt_off0000e758.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE758 10936 bytes
SHA-256: c8e780911dd9cacd5826789149ef50d9a1a7c869a6cc47fac52724c3e18eec59

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