Malicious PDF — malware analysis report

Static analysis result for SHA-256 32d6537b9bd53a70…

MALICIOUS

PDF

84.3 KB Created: 2021-03-28 01:20:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: a8fdaf7ab66f8209efbebd71652c60bc SHA-1: de68f3f89e4c13b9c52f14babfe9513c8c11a972 SHA-256: 32d6537b9bd53a709d5fe1ef9273c3d5cd151275d21277ba849dc05edde8a03a
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. It contains numerous embedded URLs, many of which point to disposable domains and are structured as link farms, suggesting a phishing or malware distribution scheme. The presence of 'utm_term' parameters in some URLs indicates a tracking mechanism, common in phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://dugedepap.ru/strik?utm_term=2006+chevy+equinox+transmission+problems PDF link annotation
    • http://about-central.com/75313527200lulb7.pdfIn PDF document text
    • https://cdn.sqhk.co/bupewazadufa/ijZhgjd/business_calendar_events_todoist.pdfIn PDF document text
    • http://summer-italy.fun/cool_math_games_60_second_santa_run_3xm9d9.pdfIn PDF document text
    • https://lulofaki.weebly.com/uploads/1/3/1/4/131453598/boxikisafo.pdfIn PDF document text
    • http://itchia.space/the_nutcracker_ballet_plot_summary3oy7v.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368242/normal_60066deb4f31e.pdfIn PDF document text
    • https://cdn.sqhk.co/jotenitix/hijcnja/evertree_inn_gunther.pdfIn PDF document text
    • https://cdn.sqhk.co/kuwusemob/jathiji/tigesavezodavawazezodoju.pdfIn PDF document text
    • http://zoxifowivo.iblogger.org/numerical_agronomy_book.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365546/normal_6015ccce7e38e.pdfIn PDF document text
    • http://themarkuzmusic.com/60395301374rv1ly.pdfIn PDF document text
    • http://usacreditmonitoring.info/10015559373dkclo.pdfIn PDF document text
    • https://vosifiteke.weebly.com/uploads/1/3/6/0/136049758/4024795.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480728/normal_60241f11a953a.pdfIn PDF document text
    • https://visofamawuri.weebly.com/uploads/1/3/2/3/132303269/163e05e1.pdfIn PDF document text
    • https://cdn.sqhk.co/zimuteraf/jgcPhfc/maate_baby_care_kit_price.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451556/normal_5fdfcccec8cbc.pdfIn PDF document text
    • https://cdn.sqhk.co/jokawefezo/jDGiaja/spiritfarer_fried_chicken_fat.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://guvenaverelud.epizy.com/gcse_maths_revision_worksheets.pdfIn PDF document text
    • http://gafazexetoraxik.epizy.com/1460510158.pdfIn PDF document text
    • https://03df18d0-0a94-4077-8b44-1f3cf8b7c870.filesusr.com/ugd/23a6c3_f26d962561ed4f65b1113d37c2de1a64.pdf?index=trueIn PDF document text
    • https://da4cb982-96ac-4827-b01c-1601b1c9977c.filesusr.com/ugd/b05c40_4ec96e5aff664ba9b50c09828cd84f37.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_off00010827.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10827 6000 bytes
SHA-256: 6549ef31a975004666765346ba4dc47acf43efae12fd44a3562abc9cc39ae7eb
font_01_sfnt_off00011c78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C78 11496 bytes
SHA-256: 99ce7ed61bf925a3de6e811b62f48da46b2f513496cdeb5a53b921a20ab61f7c

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