Malicious PDF — malware analysis report

Static analysis result for SHA-256 35191f1b9c9df989…

MALICIOUS

PDF

76.0 KB Created: 2021-06-13 20:37:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 0a81e8c7a35204c06da0eba856dd2e2c SHA-1: 797e96799dd19de17eb90c1d21d422bc889069c3 SHA-256: 35191f1b9c9df989e17d986be3e5e2da10e1b986c6d3954fad3451b78835cfb4
126 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 by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous embedded URLs, with one prominent URL pointing to 'wastran.ru', suggesting it functions as a lure for phishing or malware distribution. The document's structure and embedded links indicate it is part of a link farm designed to obscure the ultimate malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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://wastran.ru/pbw?utm_term=initiative+dnd+5e+character+sheet PDF link annotation
    • https://xokojitijuxup.weebly.com/uploads/1/3/4/3/134362284/9547204.pdfIn PDF document text
    • https://xonatusapu.weebly.com/uploads/1/3/5/3/135391421/b6b12d154b11.pdfIn PDF document text
    • https://zobatovegu.weebly.com/uploads/1/3/0/8/130873738/9212863.pdfIn PDF document text
    • https://bivupiduxod.weebly.com/uploads/1/3/4/6/134664268/puzinolewome_jarimuberuduvev.pdfIn PDF document text
    • https://lidafuxabu.weebly.com/uploads/1/3/4/8/134891514/rugepina-nezat-dejilojulu.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/e26adade-c781-4b43-8caf-b80ab25ec6bb/are_damon_and_elena_together_in_the_books.pdfIn PDF document text
    • http://natutaliva.pbworks.com/f/19949973726.pdfIn PDF document text
    • http://betosaxugawi.pbworks.com/f/mofatajowemul.pdfIn PDF document text
    • http://xixapeg.pbworks.com/f/hum_tum_full_movie_download_coolmoviez.pdfIn PDF document text
    • http://liwuvedesisu.pbworks.com/w/file/fetch/144491073/arborist_study_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b41dd0c9-5ef6-4181-a52b-5fe19b69832c/sat_practice_test_4_scoring_sheet.pdfIn PDF document text
    • http://saxonax.pbworks.com/w/file/fetch/144681678/how_to_download_gb_instagram_in_android.pdfIn PDF document text
    • http://xejujaser.pbworks.com/f/the_various_forms_of_energy_worksheet_answer_key.pdfIn PDF document text
    • http://xuzutoli.pbworks.com/f/talking_tom_gold_run_hack_download_ios.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f176039-8bb9-4532-8041-51371abcaf7a/folic_acid_foods_list_in_tamil.pdfIn PDF document text
    • http://xivoxibuza.pbworks.com/w/file/fetch/144744861/3708185438.pdfIn PDF document text
    • http://dadilotofexi.pbworks.com/f/42472613852.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21d1175e-f000-4936-b1d9-69a384acd9ba/97328117427.pdfIn PDF document text
    • http://motewutoma.pbworks.com/f/shola_allyson_ope_album_mp3_download.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_off0000e9ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9CA 5116 bytes
SHA-256: b27cd96cfa9796932d3146a5311d2250e3f5d7f300a9a7e46a157817c663a9ea
font_01_sfnt_off0000fb36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB36 11464 bytes
SHA-256: c2402f62aed9791cb0e8452f5656f787c7e3d8ff57e6a668bdd795765f0421e0

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