Malicious PDF — malware analysis report

Static analysis result for SHA-256 0daacde9d63128d2…

MALICIOUS

PDF

86.1 KB Created: 2021-05-26 18:47:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: fb451b158a0c0e75923a4fde2d26d368 SHA-1: 12c6fdd05712a2424d2858f21682e997821b7c8d SHA-256: 0daacde9d63128d2d85d1bd6b9b596072dd20bfd0fff75b5178e5eedd8035949
194 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://resalured.ru/strik?utm_term=pokemon+shiny+gold+sigma+walkthrough+pdf+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4420014/normal_5fd731ab88afd.pdfIn PDF document text
    • https://kuwavumiwedow.weebly.com/uploads/1/3/4/6/134673312/zolep.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490539/normal_5fce2ea28288e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383586/normal_605d665d1c847.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416928/normal_600c3651834d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469837/normal_6054bba782d44.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384459/normal_5fcd7006a0088.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420029/normal_6065032521f68.pdfIn PDF document text
    • https://lalazifesulalo.weebly.com/uploads/1/3/4/5/134502535/futodavavo_pagovevabekuvu_belupuzamulo_sapidupimus.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401985/normal_604f09dcd69ca.pdfIn PDF document text
    • https://bufekebutejef.weebly.com/uploads/1/3/1/8/131856184/nirafenawuwilom-lujumigov.pdfIn PDF document text
    • https://xedatuvigino.weebly.com/uploads/1/3/4/5/134580066/zukitetuvopopux.pdfIn PDF document text
    • https://rulodewarozuw.weebly.com/uploads/1/3/4/6/134678260/roxawotuduz.pdfIn PDF document text
    • https://bolafuba.weebly.com/uploads/1/3/4/6/134668532/3555083.pdfIn PDF document text
    • https://xikalevu.weebly.com/uploads/1/3/4/3/134319979/922266.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371003/normal_6034e02f233d3.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/fd03c233-9d25-4845-8439-aa77598f6462/42213935317.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ba0a5da-bd74-4f50-9b11-0a61673d20e7/dunogudenuzufavuje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07bdfb87-03fc-44e2-86d8-72669e1cd37c/chronicles_of_narnia_order_of_release.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88854cb4-e9a6-477c-a63c-77118fb3938b/41211123256.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/995b413d-2356-4937-abad-a6a3cd1f8ebb/magapemomediboxaron.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6f6e80b-170a-4332-921c-695e1f7bd784/cant_stop_wont_stop_get_guap_musically.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69a0b2b1-62b7-4067-a79f-857bb1a7c0b2/fitbit_flex_2_water_resistant.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b3c473d-f7ee-43b5-82bf-220d2888880e/39312372314.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e62b5b0-552e-4ca1-ab02-6eaef4372cc5/45615734166.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_off00010f8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F8A 5712 bytes
SHA-256: 9394ac5689c046c749d77cd3098214b87e8782380d0a618f06e5828801fb2858
font_01_sfnt_off000122f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122F5 12088 bytes
SHA-256: cbf6d60794ba748b86e787bff1b30470df967d2378b4a144f8163b9e44a49ed9