Malicious PDF — malware analysis report

Static analysis result for SHA-256 d85d176455ab3263…

MALICIOUS

PDF

70.6 KB Created: 2021-03-29 19:34:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 9f9f52ffeaba19fe7f030a8149fb8414 SHA-1: d2e1d09899193f3ee18c3acb056dd5a4211e8e6a SHA-256: d85d176455ab3263c8a7405f6ffa5c014788d2bacb8056c64e079a052ec55461
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs, many hosted on disposable domains, suggesting a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of embedded URLs and the heuristic identifying a link farm on disposable hosting point to an attempt to redirect users to malicious sites, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://baarspo.ru/123?utm_term=ismart+shankar+movie+hd++telugu PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4374177/normal_5ffdfd24231cd.pdfIn PDF document text
    • https://cdn.sqhk.co/xaloxezajaga/iho94gj/71118608919.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417313/normal_60471ad909c28.pdfIn PDF document text
    • https://zunarorukozem.weebly.com/uploads/1/3/4/0/134016655/8390978.pdfIn PDF document text
    • http://community-day.ru/measuring_angles_worksheet_answer_key_geometrybemvl.pdfIn PDF document text
    • https://rovewavulitomu.weebly.com/uploads/1/3/0/8/130873995/pupupaginokokemu.pdfIn PDF document text
    • http://7lessons.site/65865282477mqugn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500904/normal_6017b2d3024ed.pdfIn PDF document text
    • https://nuwofukejixi.weebly.com/uploads/1/3/1/4/131437867/db6d27edf5745.pdfIn PDF document text
    • https://cdn.sqhk.co/gimovitax/Ghgie8E/jenegoduzezaxatukunuzi.pdfIn PDF document text
    • http://werenntaq.online/1992_yamaha_40_hp_outboard_manualhdsmm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416930/normal_600c9931df4bc.pdfIn PDF document text
    • https://cdn.sqhk.co/zowipitilo/LgeeSDP/light_purple_tie_dye_background.pdfIn PDF document text
    • https://kilifunilazavef.weebly.com/uploads/1/3/4/4/134481566/vunop.pdfIn PDF document text
    • http://electrumwallet.buzz/bdo_fish_for_villagers7axs2.pdfIn PDF document text
    • https://xebikazogede.weebly.com/uploads/1/3/2/7/132740990/ligatamexefud.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pasazaxara.rf.gd/inkscape_trace_bitmap_speckles.pdfIn PDF document text
    • https://s3.amazonaws.com/woxojuxafopuv/lenizemaxipoki.pdfIn PDF document text
    • https://s3.amazonaws.com/wakuzidi/15586570623.pdfIn PDF document text
    • https://s3.amazonaws.com/sagotomagin/dnd_5e_bard_subclasses_ranked.pdfIn PDF document text
    • http://duvexarido.epizy.com/agent_vinod_full_movie_720p_khatrimaza.pdfIn PDF document text
    • https://s3.amazonaws.com/tuletivotarupu/football_newspaper_report_ks2.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d740.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD740 5300 bytes
SHA-256: cf97d9f206aee07f904aff01cbc9d7ec60290bd17c11333e8f04d0955b4790ba
font_01_sfnt_off0000e91c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE91C 10424 bytes
SHA-256: 6695b6d439acbbb121a95b3478cf545057099ccbac3e2e54118db13dc40a91d8

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