Malicious PDF — malware analysis report

Static analysis result for SHA-256 527f2abe2697f1df…

MALICIOUS

PDF

82.3 KB Created: 2021-02-22 01:34:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: b80fb8dd3f2ddafd0841d460a5340f67 SHA-1: 4ae09c2f25e418b7782ece87b8e8c626e0905d46 SHA-256: 527f2abe2697f1df9c690a87966ebde3c78a34e72ffab848bc26f44f596efe56
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm used for SEO-based phishing or malware distribution. The embedded URLs and the PDF structure point towards an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://maypoin.ru/123?utm_term=emerson+thermostat+buttons+not+working PDF link annotation
    • https://cdn.sqhk.co/kixituvelil/r6Qgfgi/ironite_liquid_spray.pdfIn PDF document text
    • https://cdn.sqhk.co/gasukatebu/W7ji8O9/text_art_ascii_generator.pdfIn PDF document text
    • https://cdn.sqhk.co/goxepijikun/0jhmnW0/what_animal_would_you_be_interview_question_wolf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449774/normal_5ff0333f78224.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427104/normal_602673f2f0584.pdfIn PDF document text
    • https://kaxobemux.weebly.com/uploads/1/3/4/6/134676595/xofukejozizonov-sokok.pdfIn PDF document text
    • https://cdn.sqhk.co/derepinejabi/e5ggThb/guvenlik_panik_butonu_nedir.pdfIn PDF document text
    • https://cdn.sqhk.co/xivovido/K7HEjaX/rupoxonixig.pdfIn PDF document text
    • http://prizinsta24.space/neon_health_center_on_houghbql9o.pdfIn PDF document text
    • http://gooddevice-online.com/morella_edgar_allan_poe_portuguesu1soz.pdfIn PDF document text
    • https://cdn.sqhk.co/xivomojuf/gdhfghN/undateables_time_out.pdfIn PDF document text
    • https://sanupeden.weebly.com/uploads/1/3/5/9/135961416/lebofabipebeme_zexerutaj_ledoxiwagagi_vuxaxilegizavi.pdfIn PDF document text
    • http://lnstagram-copyright-confirms.com/what_are_the_best_pokemon_booster_boxesu7jy1.pdfIn PDF document text
    • https://cdn.sqhk.co/rorajakura/v9ibhbu/fogefirotefinufadikawari.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495854/normal_5fe767699a6e6.pdfIn PDF document text
    • http://teenagetutor.net/28472047844o09xo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466662/normal_60112a6d0c17f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459469/normal_5fce8cff0a0dd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490523/normal_601b9a8039ca8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419205/normal_5fd11d602bb19.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off000105f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105F9 5320 bytes
SHA-256: 5a04d3e58661d5de69d0b8adcf4b4ac58437123d743de210cb18041d41b7b809
font_01_sfnt_off000117fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117FC 10428 bytes
SHA-256: 200e510240af63805fe391675e37f76a1b8105551201bac2b017f1b84d2bc7b7

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