Malicious PDF — malware analysis report

Static analysis result for SHA-256 081dc2b0959dc87d…

MALICIOUS

PDF

90.4 KB Created: 2021-04-17 00:41:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: c95a368a355dc30549cf22c1b6e87a88 SHA-1: 0b07611b457a48ba1de98bbb772da82b3cd47041 SHA-256: 081dc2b0959dc87daf1b76df43b126ead5dcf24b6b7a4d6425258b044f49ec8e
186 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 contains a link farm with numerous external URLs, many hosted on disposable domains, suggesting a phishing or content redirection scheme. The PDF_SEO_LINK_FARM heuristic indicates a significant number of links, likely intended to manipulate search engine results or lead users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pelibifir.ru/strik?utm_term=big+white+flying+dog+neverending+story PDF link annotation
    • https://dubitofux.weebly.com/uploads/1/3/4/4/134458445/5240891.pdfIn PDF document text
    • https://rovumixonisi.weebly.com/uploads/1/3/4/0/134012407/3059038.pdfIn PDF document text
    • https://sozivutapadonen.weebly.com/uploads/1/3/1/1/131164462/4117131.pdfIn PDF document text
    • https://tutuludoj.weebly.com/uploads/1/3/0/8/130874598/7d5e75b7340e6b.pdfIn PDF document text
    • http://gisejol.iblogger.org/vixowet.pdfIn PDF document text
    • https://rapofureduf.weebly.com/uploads/1/3/1/1/131164295/d70b29f0edbe2e.pdfIn PDF document text
    • https://kogozodibivuf.weebly.com/uploads/1/3/6/0/136094397/78e7e9e9234.pdfIn PDF document text
    • http://salowejidavu.22web.org/puweniwopujuketasadavixol.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://taruligewonuna.rf.gd/17186137624.pdfIn PDF document text
    • https://aa3bb5c3-2bd4-4791-9e2a-6e31d5009b04.filesusr.com/ugd/60e703_f6a714ba507e486093bc471037ade0b6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d87a720-bd64-4438-856f-5aafc4d0b641/zivomunerudazojonubu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6e2e10b-0749-48ef-8144-2cf5cf1aa98e/75881562003.pdfIn PDF document text
    • https://27dd58ca-3bab-4825-b0a2-cb75a9f796de.filesusr.com/ugd/aba4c5_1e36f27e26d3424d95362d8ff3840fcc.pdf?index=trueIn PDF document text
    • https://899154e9-876a-4ab4-94d5-c8ef2aed10f2.filesusr.com/ugd/dcf9ad_e7b6eefee973477f8480dfc7253e5ddc.pdf?index=trueIn PDF document text
    • http://ganomoruzon.epizy.com/luputekaxakovawi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/434104ad-a117-44cb-8231-0c9db937405c/what_was_the_outcome_of_pinckneys_treaty.pdfIn PDF document text
    • http://riberudedanute.epizy.com/babcock_flight_information_aberdeen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec0411a7-8813-4f80-a5d2-3be78ad25f65/20062453463.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_off00012568.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12568 5264 bytes
SHA-256: 06d4e81a2eaf8e226ce4e1f77ddc38ab76baa7285a41688f17ca050714566d28
font_01_sfnt_off00013773.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13773 10784 bytes
SHA-256: 8b7c1723f5864e78633bf0564b9207ddf49dd8f6ba619ef9e199e7717ba9d151

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