Malicious PDF — malware analysis report

Static analysis result for SHA-256 180283de5ac2d102…

MALICIOUS

PDF

121.0 KB Created: 2021-02-22 17:23:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 6aea0603357b28c2c4ac46e0938f258c SHA-1: 77b61172a5ed27d1698e2a922db421db387b7c1a SHA-256: 180283de5ac2d102b5350560eef92fe0782d5c06c922bdd77f4a2b4c6745332d
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a significant portion pointing to disposable domains and acting as a link farm, as indicated by the PDF_SEO_DISPOSABLE_LINK_FARM heuristic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The presence of embedded URLs and the link farm structure points towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jacksth.ru/strik?utm_term=how+to+change+time+on+sony+dream+machine+icf+c414 PDF link annotation
    • https://cdn.sqhk.co/kitujesijak/hOKsMgb/jibulanovudezaw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382413/normal_601c7952b516b.pdfIn PDF document text
    • https://cdn.sqhk.co/pimidima/j2ZZiaE/lolufijases.pdfIn PDF document text
    • http://ag-management.space/twilight_saga_movies_ranked3b7y0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387815/normal_5fdf7cc6b2d2e.pdfIn PDF document text
    • http://return-0.com/24624004437jpnxp.pdfIn PDF document text
    • http://micrometer25bill.site/pathfinder_familiar_archetypes_guidelb23t.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.orgThisIn PDF document text
    • http://www.fontrix.comhttp://www.nhncorp.comIn PDF document text
    • http://rawozenagi.epizy.com/bexatekarotilepiwijubixul.pdfIn PDF document text
    • https://s3.amazonaws.com/zopenave/wallpaper_sword_art_online_for_pc.pdfIn PDF document text
    • http://lavavil.rf.gd/water_hardness_titration_lab_report.pdfIn PDF document text
    • https://s3.amazonaws.com/joterige/linear_pair_angles_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/jarirotexab/cabergolina_posologia.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
    • http://scripts.sil.org/In PDF document text
    • http://scripts.sil.org/OFLAbyssinicaIn PDF document text
    • http://fsf.org/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/philosophy/why-not-lgpl.htmlIn PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE21 5696 bytes
SHA-256: 5ec7c9f65d05a0f5369ff44163e3dfcb39b78bd7c27e34e27813ee8ecf646705
font_01_sfnt_off0001017a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1017A 20720 bytes
SHA-256: 60350ff94e87d5260c59f0a2830d15e8bba77d6903d5948db601a7cc4a5b8f9e
font_02_sfnt_off0001208b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1208B 109476 bytes
SHA-256: ec043f80c7d9983090aafa107f2d4c8b56a1a7f1264141adcce86f1c923a5528
font_03_sfnt_off00019424.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19424 2280 bytes
SHA-256: 21154673c0b88e607322906320f993fc90714701a617bd4bfb9f844e753f3681
font_04_sfnt_off00019ded.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19DED 10908 bytes
SHA-256: 4750bc16e161c6f95d65cb28a2ab51f17a808b3493f1f05445a556f503ec86bf
font_05_sfnt_off0001c350.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C350 5800 bytes
SHA-256: 8fc89f5f4a154dad04e9b64fa54068f01657b80cca42e57174cd98f30c8b55fb

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