Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fd70153c3f2831b…

MALICIOUS

PDF

74.8 KB Created: 2021-04-20 01:02:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 62a1fc8c6408379fcd179caeff78d79d SHA-1: 7eba0472efa2bd319ca9809b1dff1b454f5fc13f SHA-256: 5fd70153c3f2831b6761ff09be5068bf71bb3abd3e81ee80a0bc6d3f6d632ae1
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious sites. The embedded document body, though heavily obfuscated, contains references to search terms and application details, possibly as a lure or to evade detection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jumiwimov.ru/strik?utm_term=2005+jeep+grand+cherokee+5.7+hemi+problems PDF link annotation
    • https://cdn.sqhk.co/zalivelo/whd1cY4/giruvurelu.pdfIn PDF document text
    • http://requiremcgood.com/calendario_milan_2018_191crmp.pdfIn PDF document text
    • https://cdn.sqhk.co/xavexapoxiv/dii6Ggi/drone_attack_on_saudi_oil_pipeline.pdfIn PDF document text
    • http://azakalaza3.xyz/dojawidaputg9fah.pdfIn PDF document text
    • http://goproonly.com/pekoxenl1yt.pdfIn PDF document text
    • https://cdn.sqhk.co/wepugozotap/j9YXCbU/tuning_forks_for_sale.pdfIn PDF document text
    • http://alcexpress3.xyz/pokuwibusexufojujureregdqf1p.pdfIn PDF document text
    • https://cdn.sqhk.co/xulawajikigi/cjiQjEv/marco_menu_one_utama.pdfIn PDF document text
    • https://cdn.sqhk.co/sisuriwul/jQxhdhi/61494341161.pdfIn PDF document text
    • https://cdn.sqhk.co/jukusenefow/ghghjph/panitefapafagufogevujak.pdfIn PDF document text
    • http://littlenat.space/90704702512cukv3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://692937ca-140d-46b9-9715-018e108c1018.filesusr.com/ugd/2540a5_e468499a6ffe4dcda3cb5153d812b20c.pdf?index=trueIn PDF document text
    • https://0108a07e-94d6-443d-bfa7-575dd38852ad.filesusr.com/ugd/756a01_4eeafc613efe43d7af1162da0e741dbe.pdf?index=trueIn PDF document text
    • https://911f1565-2faa-4874-b261-330d521e7362.filesusr.com/ugd/f46427_c03d2797f68149bb9829f2d62426d6e9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dejazuvorira/downloadable_free_printable_weight_loss_colouring_chart.pdfIn PDF document text
    • https://e4034479-4ead-418b-af8c-5be8dc72bdbe.filesusr.com/ugd/1e8759_24604acb55e24495ab0d7d3fbe3dcee8.pdf?index=trueIn PDF document text
    • https://01c4c9a3-ee74-4db9-a65d-799443b8dbf1.filesusr.com/ugd/a64c8c_53745401b08d4647b4ed80ce2899803c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rekorewexidiwo/7211013872.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwuxot/bydureon_pen_instructions.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_off0000e4b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4B7 6180 bytes
SHA-256: 65f57882dc5a9b798d4a880b9dd37e9206ea2721970fa7ee67219ba58bf32652
font_01_sfnt_off0000f9a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9A3 10560 bytes
SHA-256: ebc76ad18cce191c2a4e274af340422cb3d8edb020c2af742a4124e05c0e7d04

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