Malicious PDF — malware analysis report

Static analysis result for SHA-256 2df4f85ad128d17d…

MALICIOUS

PDF

71.2 KB Created: 2021-03-11 00:18:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 72f02b01980f1d451f8b1cbf5cf39ac8 SHA-1: 284b52ac4c785e065cbcc7d85b6a76f2a4ae8410 SHA-256: 2df4f85ad128d17dacd8572462f234aa81176af757043fe7926bae2e93bcd478
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially harmful content. The document body, though heavily obfuscated, appears to be a lure related to a book download.

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://xezojetit.ru/aws?utm_term=el+poder+de+la+mujer+que+ora+libro+pdf PDF link annotation
    • http://dabejorugorazom.22web.org/corpus_linguistics_for_grammar.pdfIn PDF document text
    • https://xinagaxigivawiv.weebly.com/uploads/1/3/0/7/130739766/wikatem.pdfIn PDF document text
    • https://kenemujawov.weebly.com/uploads/1/3/4/6/134645985/8a25a.pdfIn PDF document text
    • https://guzepebizosi.weebly.com/uploads/1/3/4/8/134880367/wopux.pdfIn PDF document text
    • https://tonawonigavima.weebly.com/uploads/1/3/5/3/135345065/4746445.pdfIn PDF document text
    • https://wivozodibadire.weebly.com/uploads/1/3/0/7/130775536/monigunovubif.pdfIn PDF document text
    • https://wigadanoj.weebly.com/uploads/1/3/4/4/134404864/9841652.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473062/normal_60098427ecd15.pdfIn PDF document text
    • http://xesepoxobij.22web.org/what_to_write_in_a_time_capsule.pdfIn PDF document text
    • http://jamutanizeduzu.iblogger.org/agile_project_management_with_kanban_microsoft.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370540/normal_601a2fadc1a50.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415070/normal_5fe456f489ece.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381740/normal_603c50e134e01.pdfIn PDF document text
    • https://melijezaziwoni.weebly.com/uploads/1/3/4/8/134851492/guxirutesizav.pdfIn PDF document text
    • https://wivetagimogik.weebly.com/uploads/1/3/4/6/134618772/puzolo.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/mubemutolewe/54753876096.pdfIn PDF document text
    • http://fewufewidi.epizy.com/amiduos_for_windows_7_64_bit.pdfIn PDF document text
    • https://s3.amazonaws.com/dixaleko/blue_cross_illinois_claim_review_form.pdfIn PDF document text
    • http://votasaze.rf.gd/whiskey_words_and_a_shovel_2_download.pdfIn PDF document text
    • http://nirenubatimop.rf.gd/freemake_audio_converter_offline.pdfIn PDF document text
    • http://vupileloluxus.rf.gd/quadratische_funktionen_lsen_mit_pq-_formel.pdfIn PDF document text
    • http://wewefaxekedafoz.epizy.com/risatebaruromebokikutefi.pdfIn PDF document text
    • http://gajovab.epizy.com/battle_royale_2d_apk.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_off0000d6b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6B0 5308 bytes
SHA-256: 9a57b9aae9974c956238f78c41588bad05a7a4de049c5fd921e963302ca195ab
font_01_sfnt_off0000e8a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8A4 11412 bytes
SHA-256: a261fce319426bf4131eb334abd4e0651f3171a8d55dc9509c0c8913422933b8