Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8e97220f6b3ccbc…

MALICIOUS

PDF

84.5 KB Created: 2021-02-28 18:46:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6934c7f068e046ce925fba2becb4381d SHA-1: 9e36fa348da97fabf289e02e57bbf312b4c7a616 SHA-256: e8e97220f6b3ccbc9fe1b91109056808a92d8405d74cad761b20172afc808ea9
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The document body, though partially corrupted, contains text related to song lyrics, likely a lure to disguise the malicious intent of directing users to the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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 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://crophysi.ru/strik?utm_term=if+the+savior+stood+beside+me+tagalog+lyrics
    • http://lifolibi.sportsontheweb.net/bebepudajafigewexatowejas.pdf
    • http://gnoogle.site/ghostrunner_ps4_gameplayd8rg0.pdf
    • https://sejimewopokotas.weebly.com/uploads/1/3/5/3/135350214/7151256.pdf
    • https://vumazilizulorap.weebly.com/uploads/1/3/5/3/135300666/mewopizisinorul.pdf
    • https://letateworu.weebly.com/uploads/1/3/4/3/134365764/vuloto.pdf
    • https://jonukejunuxesa.weebly.com/uploads/1/3/1/4/131409236/dbf90870cc064c.pdf
    • http://xamawigokoke.mygamesonline.org/79386123978.pdf
    • https://dudafenerow.weebly.com/uploads/1/3/4/9/134900552/dedujamijiziv-vudokaguvaxutoj-danolar.pdf
    • http://mavigawika.scienceontheweb.net/warm_bodies_2013_trailer.pdf
    • https://sobomimaseneke.weebly.com/uploads/1/3/1/3/131379860/1786828.pdf
    • https://sosedegif.weebly.com/uploads/1/3/2/8/132815053/vunigusorazagivojebu.pdf
    • https://kikafizujugu.weebly.com/uploads/1/3/4/0/134012642/8904359.pdf
    • http://xewosaxebojufir.iblogger.org/monk_character_sheet_5e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://fereralud.epizy.com/muxiwenonesapaka.pdf
    • http://rixibedi.onlinewebshop.net/what_is_a_good_thesis_statement_for_a_persuasive_essay.pdf
    • http://daxevetefixidaj.epizy.com/31936813030.pdf
    • http://jalasofumikom.rf.gd/zumipajoxetojekafiputol.pdf
    • http://zebekebagen.epizy.com/flannelette_fitted_sheet_king_single.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd1d.bin
2163a677f3c2b646594b78fff07ca3af7ab727de705b955c6ec6f57247b54b20		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD1D 5356 bytes
font_01_sfnt_off00010f5f.bin
eda32909a09047b5d1371232b39c65680803d96e8c3d3d447af7f8d30bd262d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10F5F 11892 bytes
font_02_sfnt_off0001360d.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1360D 4324 bytes

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