Malicious PDF — malware analysis report

Static analysis result for SHA-256 816856f2b3f2663c…

MALICIOUS

PDF

105.7 KB Created: 2021-04-09 01:36:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: df1a76f2c4d514ab66d7d9ff7f21d768 SHA-1: d55ba2c4f570a0c8c21983bdcd892be1aceacfdc SHA-256: 816856f2b3f2663c9dc53ca5e36d0b17aa4244c0c3afd53a2da7defc034b6fa9
126 Risk Score

Malware Insights

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

The PDF contains an embedded URL that redirects to a link farm, a common tactic for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though partially corrupted, suggests a lure related to religious commentary, likely to trick users into visiting the malicious URL.

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://crophysi.ru/strik?utm_term=psalm+23+1-6+commentary
    • https://cdn.sqhk.co/rinilafexowi/Ahhghwi/yu-_gi-_oh_duel_monsters_gx_card_almanac.pdf
    • http://towajemikof.iblogger.org/fazufesevajewifekako.pdf
    • https://ronunute.weebly.com/uploads/1/3/1/0/131070227/lowuto_zaxujofatuzexa_wemawefaxutobo.pdf
    • https://sonikimejikelo.weebly.com/uploads/1/3/2/6/132681145/xufebipiliremuked.pdf
    • http://sabeladiwuz.22web.org/87262785344.pdf
    • http://komunomaled.iblogger.org/cbt_for_generalized_anxiety_disorder.pdf
    • https://niritopep.weebly.com/uploads/1/3/4/6/134634222/8003054.pdf
    • https://cdn.sqhk.co/dusujukakal/ihgtWZX/bluffer_definition_francaise.pdf
    • https://cdn.sqhk.co/zoluxoni/fgchihj/41752758226.pdf
    • https://cdn.sqhk.co/waxipefimafa/gijnp88/mogejojog.pdf
    • https://cdn.sqhk.co/pujixefan/shil5Fm/49460206720.pdf
    • https://tujurexi.weebly.com/uploads/1/3/4/7/134743655/ledaxik.pdf
    • https://watumuguv.weebly.com/uploads/1/3/2/6/132695830/labereduvuguluv.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/618f5068-7560-4c1d-8fb3-5a8396fc56e7/bojanobidalixofebavuzito.pdf
    • https://uploads.strikinglycdn.com/files/9fed74eb-7cbf-4f8e-b27a-be86180303d5/interior_and_exterior_angles_of_regular_polygons_worksheet_answers.pdf
    • http://lisunamubeso.epizy.com/ecommerce_template_html5_responsive_free.pdf
    • https://uploads.strikinglycdn.com/files/f4a1d7b9-2229-4829-9252-575e77ac4ad6/why_dont_students_like_school_by_daniel_t._willingham.pdf
    • http://vutiwaravoril.rf.gd/can_i_talk_to_a_real_person_at_fedex.pdf
    • http://terabamof.rf.gd/camino_primitivo_albergues.pdf
    • http://vibexezesi.epizy.com/zewopelozopuluz.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000160df.bin
a33603f786e44a9bf780349a764fed416403ba566bd092ff2480b8dc0946500d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x160DF 5584 bytes
font_01_sfnt_off000173d8.bin
851f2112ca6298c8ff8c3c8c2591fbd4da224002059473a31b0449460e919e7a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x173D8 11068 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.