Malicious PDF — malware analysis report

Static analysis result for SHA-256 46a638bbb72ed5b0…

MALICIOUS

PDF

86.8 KB Created: 2021-02-23 12:59:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 68a0b031ceb8ea89b3eca6a415d86b34 SHA-1: 20d1332276fa47bbe5e15f65e7a64c87401cfb6e SHA-256: 46a638bbb72ed5b037498661fabf098cd0d86628ca574b90d9396381ef3484fe
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many pointing to disposable domains, and a heuristic identified it as a link farm designed to host a large number of links. This suggests the primary purpose is to redirect users to potentially malicious websites, likely for phishing or malware distribution.

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://jacksth.ru/123?utm_term=fulltone+ocd+ge+the+gear+page PDF link annotation
    • https://vugulufubixe.weebly.com/uploads/1/3/5/9/135979185/ee361fa68e74.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451374/normal_600aee93e2b09.pdfIn PDF document text
    • http://copyright-helps-team.com/jio_video_calling_softwareb5aic.pdfIn PDF document text
    • https://cdn.sqhk.co/josipinu/ijhgihs/piano_keyboard_layout_88_keys.pdfIn PDF document text
    • https://cdn.sqhk.co/mudifuto/bgjijcE/i_must_go_my_planet_needs_me_gif.pdfIn PDF document text
    • http://jewuzalozegeso.iblogger.org/7528977248.pdfIn PDF document text
    • http://kozlo.space/48323247458ol8wq.pdfIn PDF document text
    • http://boost-store.net/nissan_sentra_owners_manual_2015gwss2.pdfIn PDF document text
    • https://lezogije.weebly.com/uploads/1/3/1/8/131858481/kigepesawojuxukex.pdfIn PDF document text
    • http://national-verifyteam.com/sufadeneje8gb3m.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460981/normal_5ff3b146813e7.pdfIn PDF document text
    • http://xejevojesinil.22web.org/razer_carcharias_gaming_headset_drivers.pdfIn PDF document text
    • https://fudukonuxevefez.weebly.com/uploads/1/3/4/6/134606022/7068736.pdfIn PDF document text
    • http://storezone.info/5700270643682wgi.pdfIn PDF document text
    • https://cdn.sqhk.co/bajafigotuvi/jBjdidV/yellow_cab_az_app.pdfIn PDF document text
    • https://jewadasin.weebly.com/uploads/1/3/4/6/134604584/xelovisab.pdfIn PDF document text
    • https://zerimesatevig.weebly.com/uploads/1/3/4/8/134879836/jefezewuj-watefekag-wuwijidiji.pdfIn PDF document text
    • http://all-host.site/beetalk_versi_lama_untuk_iphone1a05v.pdfIn PDF document text
    • http://ygrash.website/bigawavemibemizafozosa2q0rn.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://kasanuvuwa.epizy.com/the_invention_of_lying_subtitles_english.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010836.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10836 4948 bytes
SHA-256: 1b89c66e29c6c108a5053f88870c305a938d152027c5f66c2ba5295a14a20b96
font_01_sfnt_off00011900.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11900 11404 bytes
SHA-256: 4a2cdf49f622d256627e6b85ddb4461e8c09df2bd3a87aed50c67ce2276f90d6
font_02_sfnt_off00013f5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F5B 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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