Malicious PDF — malware analysis report

Static analysis result for SHA-256 14bd44583001cfb3…

MALICIOUS

PDF

82.9 KB Created: 2021-03-06 02:23:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 6b84466cedd1838d2f524c64fff3b3ae SHA-1: f1717776f224fa49f286c8d6c6d2e287b4883d71 SHA-256: 14bd44583001cfb32a6966a7292868dddec9264fa2f4dfed9899134656775d08
186 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a link farm, with many pointing to disposable hosting. This behavior, combined with ML and ClamAV detections, strongly suggests a malicious intent, likely to redirect users to phishing or malware hosting sites. Although no scripts were directly extracted, the PDF structure and heuristics indicate it's designed to facilitate malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://golowaki.ru/aws?utm_term=1994+honda+accord+trouble+codes PDF link annotation
    • https://cdn.sqhk.co/zodenizekija/jeJwyij/girl_next_door_fashion_style_meaning.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388163/normal_5fc83470ebf84.pdfIn PDF document text
    • https://cdn.sqhk.co/xezojutatow/ghtdqic/15058183255.pdfIn PDF document text
    • http://juzezudusota.mypressonline.com/emotional_guidance_scale_spiral.pdfIn PDF document text
    • https://cdn.sqhk.co/rowazazapa/cifmhb1/lonikukilu.pdfIn PDF document text
    • https://cdn.sqhk.co/gigatakel/drXhVgf/62130746511.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401519/normal_603806645ab15.pdfIn PDF document text
    • https://cdn.sqhk.co/moserusoba/eBeR4zC/moto_x3m_bike_race_game_download_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/bidogefapo/DGJlxgi/bomame.pdfIn PDF document text
    • https://cdn.sqhk.co/xaranoraf/THDgdhh/zuxepofigo.pdfIn PDF document text
    • https://cdn.sqhk.co/kapidibewomu/Ec9jawe/you_hit_them_all_bible_verse.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388065/normal_604215cbc7f3b.pdfIn PDF document text
    • http://pasikufopubiwo.mypressonline.com/matematicas_financieras_capital_concepto.pdfIn PDF document text
    • http://riwotivadejud.sportsontheweb.net/when_a_guy_says_he_really_likes_you_but_doesnt_want_a_relationship.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476420/normal_600a53f0a3e89.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368486/normal_5fe793a9e9668.pdfIn PDF document text
    • https://cdn.sqhk.co/zedawuzijis/jfjeQF3/robzone_duoro_xcontrol_profi_navod.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/vazisi/bazebenaxotubapuga.pdfIn PDF document text
    • https://964beff5-d24f-450a-94e2-fa7e9faef44a.filesusr.com/ugd/61158f_6da6fb736218456192bc84a538cfcbc4.pdf?index=trueIn PDF document text
    • https://9534cc33-30dc-483d-bed2-8d5691710d48.filesusr.com/ugd/3835dd_dc70d7f216c342429bcb7d55700642ad.pdf?index=trueIn PDF document text
    • http://vimixof.onlinewebshop.net/35202701073.pdfIn PDF document text
    • https://eb72eaa1-ef55-40a3-a653-f6d21bccf295.filesusr.com/ugd/54913d_434b57dcf7294ff5a469b6a9d8a2bbfd.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/purixifusipelid/x_ray_powerpoint_templates.pdfIn PDF document text
    • https://4ad55601-b8ab-4ae0-bc0e-e90069072326.filesusr.com/ugd/3aca14_3bcddf41c28d4e108a57fe6b0f7d8d09.pdf?index=trueIn 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_off0001063c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1063C 5368 bytes
SHA-256: c5cb609857d4220177a4222aad52267600480d12383c5c4c632a1371763ca2ac
font_01_sfnt_off00011875.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11875 10904 bytes
SHA-256: d89866e3844f0c67f7c79c22fe809cff15ff23d2ac05035a95d86139220617f0