Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bd32122e146f5e3…

MALICIOUS

PDF

72.0 KB Created: 2020-12-20 03:39:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 88f37c502958c1b03591174785d75b79 SHA-1: 1be95a64f228e27c326d50bb59c14baa8c9726ff SHA-256: 2bd32122e146f5e301502aa21776f5f8388cb51ed02683a7a925034eb1c6bb9f
244 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous embedded URLs that point to external sites, including a known malicious redirector. The document's structure and embedded links suggest an attempt to lure users to potentially harmful content, likely for phishing or malware delivery. No scripts were extracted from this sample.

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
  • 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.
  • 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.
  • 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://ggtraff.ru/123?utm_term=kathi+weeks+the+problem+with+work In PDF document text
    • https://zibinileder.weebly.com/uploads/1/3/4/7/134748255/badoduni.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475376/normal_5fc537902c4fa.pdfIn PDF document text
    • https://xizogezoki.weebly.com/uploads/1/3/4/7/134717510/1b785c9261ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390684/normal_5f986846b9448.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413226/normal_5f95aaaa2c0fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428335/normal_5f9ce66f8d7cd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426832/normal_5fc919697d0d6.pdfIn PDF document text
    • https://matubupediguja.weebly.com/uploads/1/3/4/1/134131452/056dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393044/normal_5fa016854de64.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409250/normal_5f97e76e56a54.pdfIn PDF document text
    • https://wujipiledulom.weebly.com/uploads/1/3/4/6/134695719/b3b6457d.pdfIn PDF document text
    • https://guzepebizosi.weebly.com/uploads/1/3/4/8/134880367/tilikilijirabok.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/f916ec7f-4202-4f6a-8581-20215b512a06/4413529097.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc29c1b8787e8798976ec1d/t/5fc6a6e5f8cdb769c6ce81df/1606854374103/9641973224.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d06a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD06A 5004 bytes
SHA-256: 9fcebac1a2f6fc24094acc846905d9799383e791892b632ed3cb2aa3a917afed
font_01_sfnt_off0000e176.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE176 10496 bytes
SHA-256: 9f6a84f79aab6dd2cc231864918b4dddaf98268396403cc59a903ea11b31c594
font_02_sfnt_off00010520.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10520 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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