Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca3a3de7ab780e69…

MALICIOUS

PDF

64.8 KB Created: 2021-02-13 04:18:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: c0e85f02181c5527d9a5e95bfbff762a SHA-1: 6e206b56c87aa1fbb5d05faa25f91f56dc543fcb SHA-256: ca3a3de7ab780e6926c2a5374eeab4b827da9e4012bbc9ab69cc91d291fa7ebe
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan. It contains numerous embedded URLs, with one prominent URL pointing to 'baarspo.ru', suggesting a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for link farms, further supporting malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/wb?keyword=bensound%20evolution%20free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4371272/normal_600a4940bf75b.pdfIn PDF document text
    • https://cdn.sqhk.co/xubupigegi/iZUgiVJ/80841036810.pdfIn PDF document text
    • https://cdn.sqhk.co/zimuteraf/Qjie6gj/lenovo_laptops_yoga_710.pdfIn PDF document text
    • http://test123test.xyz/rivadagomesatevupuzuzakolb4x.pdfIn PDF document text
    • https://cdn.sqhk.co/woxekivepi/WhfmERv/pexizotodagoxukupa.pdfIn PDF document text
    • http://pabazumakubonok.66ghz.com/amadeus_director_forman_crossword.pdfIn PDF document text
    • http://nakrutkavk.site/formal_letter_of_indefinite_leave_of_absencesnqs7.pdfIn PDF document text
    • http://jolujunutido.iblogger.org/sovewipizodatevopipuz.pdfIn PDF document text
    • https://cdn.sqhk.co/nupasoxure/gigihgD/sniper_master_city_hunter_mod_apk_rexdl.pdfIn PDF document text
    • https://cdn.sqhk.co/mezigiduze/jgfiapE/dexexusufeguruxomi.pdfIn PDF document text
    • http://service-hire.com/affidavit_of_adverse_possession_form_georgia6hi2o.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410027/normal_5ffe9c3182d5b.pdfIn PDF document text
    • https://cdn.sqhk.co/kixagixupo/idNZpjc/jemuvaxenepepawetovew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484118/normal_602178fbe1d97.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://disupenepoka.epizy.com/autograph_bengali_full_movie_in_hd.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_off0000c56f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC56F 4800 bytes
SHA-256: 622a65c8db282c5f95236f966250241ae173f785b872ba8e63f46372dc082b25
font_01_sfnt_off0000d5d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5D5 9664 bytes
SHA-256: 8a2c187371573bf93c2af303a9abab06b8aa67e333504c789429383546414c87

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