Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e999d8576c3daad…

MALICIOUS

PDF

83.3 KB Created: 2021-04-30 14:05:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 50a9585fbf539b4d14dcaa6b6c12ca74 SHA-1: 82047597ad07b9c16b814fa6a97086d0a48f9a8d SHA-256: 5e999d8576c3daadd0a01f610e08f80c8702f0ea6f2903a40f141f5dc724a037
156 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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • 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.
  • 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://midufefew.ru/strik?utm_term=avengers+age+of+ultron+script+pdf PDF link annotation
    • https://cdn.sqhk.co/mogezunir/a2Chhhb/lego_hidden_side_ghost_train_express_review.pdfIn PDF document text
    • https://vosuzupitozom.weebly.com/uploads/1/3/5/3/135313705/gakuk_tiwavurel.pdfIn PDF document text
    • http://ideaita.fun/xivadujazezuwijin9n14s.pdfIn PDF document text
    • https://tekoxinir.weebly.com/uploads/1/3/4/6/134606092/togebetewevabog_duxojosip.pdfIn PDF document text
    • https://wurilulisewanid.weebly.com/uploads/1/3/4/7/134728532/998519.pdfIn PDF document text
    • https://jufigewadekuxo.weebly.com/uploads/1/3/1/4/131406441/tabuvowexe_xepatis.pdfIn PDF document text
    • https://cdn.sqhk.co/nexoratuxi/fjehFJM/41890444864.pdfIn PDF document text
    • https://tokadasokavetim.weebly.com/uploads/1/3/4/6/134688198/d79a2278.pdfIn PDF document text
    • https://mavuweginu.weebly.com/uploads/1/3/2/6/132681431/wexitozimo.pdfIn PDF document text
    • http://bit7.top/how_to_program_a_chamberlain_garage_keypad6iglk.pdfIn PDF document text
    • https://gadonivoxe.weebly.com/uploads/1/3/5/3/135331758/a9a4c3db619.pdfIn PDF document text
    • https://tadududire.weebly.com/uploads/1/3/4/6/134687045/wesir.pdfIn PDF document text
    • http://dfds.in/pawafuzumurobubekezawur5bwob.pdfIn PDF document text
    • http://devgm.design/kasoguwipah3h6f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mavixu/who_has_the_best_prices_on_keurig_coffee_makers.pdfIn PDF document text
    • https://s3.amazonaws.com/pajukovuxetu/a_bug_s_life_game_ps1.pdfIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/lazup.pdfIn PDF document text
    • https://s3.amazonaws.com/rerinago/23043629228.pdfIn PDF document text
    • https://s3.amazonaws.com/zukogi/xizaladiwefivakeme.pdfIn PDF document text
    • https://s3.amazonaws.com/bezegoluzose/tinijomaxusirawen.pdfIn PDF document text
    • https://s3.amazonaws.com/jusuberu/gezumitununorukito.pdfIn PDF document text
    • https://s3.amazonaws.com/dotivaf/xidiwim.pdfIn PDF document text
    • https://s3.amazonaws.com/pugomonapoxuxe/50906399628.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_off00010a02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A02 5372 bytes
SHA-256: 073b00dede8cb6db06882e573a8d6b4e9a17cc2b3b6d7d264d403f7737a29693
font_01_sfnt_off00011c67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C67 10312 bytes
SHA-256: cf5ed366c6247e13d7c8a3f3f1bfbb6ac2465c320b76b63f5b65981b08643ad3

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