Malicious PDF — malware analysis report

Static analysis result for SHA-256 d56e80cc5565e6e5…

MALICIOUS

PDF

68.6 KB Created: 2021-03-15 16:20:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 81ebdee8600e503baf0821fdf8ed467d SHA-1: 5925fca0dd3c0afe76fa5dbbaa87793e8dc34cab SHA-256: d56e80cc5565e6e5240f542195915f79eb94432b31ba5c2f2ba12e0bfb98ba1d
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://xajibur.ru/wix?keyword=free+souls+glitch+mortal+kombat+x PDF link annotation
    • https://ganupedudajoz.weebly.com/uploads/1/3/4/5/134586443/5dbfc8.pdfIn PDF document text
    • https://fikenetefi.weebly.com/uploads/1/3/4/7/134771518/5e0649324cfb1.pdfIn PDF document text
    • https://likufuzojelawaf.weebly.com/uploads/1/3/5/2/135298946/5294262.pdfIn PDF document text
    • https://sogifeni.weebly.com/uploads/1/3/2/7/132712483/b03f8c77b70acf.pdfIn PDF document text
    • https://bakogala.weebly.com/uploads/1/3/1/3/131384254/redutabimabunu.pdfIn PDF document text
    • http://wowofiluze.22web.org/bleeding_and_clotting_disorders.pdfIn PDF document text
    • https://zeberafuduzugag.weebly.com/uploads/1/3/2/6/132682167/wojubasolaliwalimi.pdfIn PDF document text
    • https://tugojomabam.weebly.com/uploads/1/3/4/5/134588125/823449.pdfIn PDF document text
    • https://tozilamuvopodes.weebly.com/uploads/1/3/5/9/135966944/9986263.pdfIn PDF document text
    • https://wejobufobugof.weebly.com/uploads/1/3/5/3/135348322/xirojuwu.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/3c34e8b4-8165-492b-a6de-3635efb6bd78/inkheart_book_reading_age.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f204e62-bdc9-4327-baf7-448eff0367c7/31228300973.pdfIn PDF document text
    • http://lofadekiwi.rf.gd/tencent_gaming_buddy_64_bit_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d02e5ff-d966-4042-8484-0822954541a9/63847212033.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c29bf52-7513-4cfd-9e62-9eaee0267ac9/litivoba.pdfIn PDF document text
    • http://nipesuvaz.epizy.com/boris_yeltsin_biography.pdfIn PDF document text
    • http://vofovesotidogi.epizy.com/37907650220.pdfIn PDF document text
    • http://rejizupufuxetib.rf.gd/bse_online_trading_platform.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4a282af-ef85-4eac-9d3c-c97e5796d718/19934580003.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61511d73-7d58-44dc-b009-6a1d0c23c4a5/how_to_remove_a_glacier_bay_shower_cartridge.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_off0000c612.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC612 5440 bytes
SHA-256: 0f4d1b9785ea18ef53ede3a0fa0c2b7526521e4294154c8eb11297c9c1c99c91
font_01_sfnt_off0000d864.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD864 2092 bytes
SHA-256: 13678a14b930e6d42e11b2ac41b13981c2c7f5938cc30cfb194ad51886f1f1dd
font_02_sfnt_off0000e208.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE208 9652 bytes
SHA-256: d28a6faa03684e54aeb6eba7920a8435409d831480d90e24d7f853818ab07bc8

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