Malicious PDF — malware analysis report

Static analysis result for SHA-256 e345adbd0782ac0a…

MALICIOUS

PDF

81.3 KB Created: 2021-03-15 11:47:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 5a3cee7a68f3b579a3a43218e8456c9b SHA-1: 915af74b874ce8ee5608a3a931424b4e7db3a674 SHA-256: e345adbd0782ac0ac70765c3733dd89ffddd2829a6b21f864ad31f245a320fd3
186 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 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
  • 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://zajinet.ru/123?utm_term=wind+energy+pros+and+cons+pdf PDF link annotation
    • http://lamejix.scienceontheweb.net/rareborupe.pdfIn PDF document text
    • https://cdn.sqhk.co/lexikegije/Khjuieu/enterprise_wide_risk_assessment_template.pdfIn PDF document text
    • https://cdn.sqhk.co/tegatiwuwax/heuhg3u/lolebeguk.pdfIn PDF document text
    • http://foropemewefuwif.22web.org/5373398968.pdfIn PDF document text
    • https://cdn.sqhk.co/xozifejor/ibOhHKo/blaze_monster_truck_cake_images.pdfIn PDF document text
    • https://cdn.sqhk.co/zijikunu/jgPhgUD/vurupepinimaluguje.pdfIn PDF document text
    • https://cdn.sqhk.co/vumatoxikom/hbgdQhe/play_free_movie_trivia_games_online.pdfIn PDF document text
    • http://nafewid.sportsontheweb.net/14607304982.pdfIn PDF document text
    • http://xulodol.mygamesonline.org/buds_training_program.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://189c2d36-84ff-4b81-9465-96c33c1d3b91.filesusr.com/ugd/35ddae_441f5d0d2a9a4760b7559043d62d72b5.pdf?index=trueIn PDF document text
    • https://3e80c8bf-0031-4ca1-bfa9-4484641fefed.filesusr.com/ugd/08103e_6933f740d65842a88fe884d1b1e42548.pdf?index=trueIn PDF document text
    • https://6a24fdd2-d4a5-4c4b-882b-0f3115751bcf.filesusr.com/ugd/04e6f9_e2e4a153263c42a1aa9465852e54db90.pdf?index=trueIn PDF document text
    • http://pozidijapepore.atwebpages.com/blaze_of_glory_line_dance.pdfIn PDF document text
    • https://3bcdeb60-9876-4d14-bc0a-1dd1632c647c.filesusr.com/ugd/16a96a_1055a8dbded140ff8a8748f5101b1ddb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zobuwubedak/manamey_album_video_song_masstamilan.pdfIn PDF document text
    • https://c07b3cb0-7d4a-4e65-9c62-eb3bd0ce3b6b.filesusr.com/ugd/7560d5_8a3db7e9f232475b8f681684042665e2.pdf?index=trueIn PDF document text
    • http://xivobotaxonid.epizy.com/ielts_paper_date_sheet_2019.pdfIn PDF document text
    • https://13ea8442-998f-4f14-ba3b-7f37e53a414c.filesusr.com/ugd/008a9f_8c3a2f426765455ab08f9579db3251b9.pdf?index=trueIn PDF document text
    • https://8c17aa34-c454-4d6c-a218-8929c845e329.filesusr.com/ugd/808cd0_82c80244cd5d4fc7b1f9f674c1afa55b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/folexapurilowe/44889347173.pdfIn PDF document text
    • https://4b4b92a8-4ac5-4030-97d5-af0917f8c077.filesusr.com/ugd/0251f0_0fa66ec524b64f429e439239ab33ab7e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/padadutiseni/multiplying_rational_numbers_worksheet_doc.pdfIn PDF document text
    • http://xaraxojiruf.epizy.com/gusegugijuxibetidutijesi.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_off0000f18b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF18B 5116 bytes
SHA-256: 10b599c597b4ed8b97071c0591db0c6bc32810b18189a9fa9495ed7fed9d3e3c
font_01_sfnt_off00010300.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10300 10884 bytes
SHA-256: d64937005b8909bc31a37ce99c25e5b32f9d77a2769bc51efdc88c7532893fcb
font_02_sfnt_off000127e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127E7 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e