Malicious PDF — malware analysis report

Static analysis result for SHA-256 340414d5d0bd5c47…

MALICIOUS

PDF

74.2 KB Created: 2021-03-13 15:57:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 067f6df7d2dd327b830c053aa54e0c96 SHA-1: 30a04104a50329d06547421a2b2fbc3929e60144 SHA-256: 340414d5d0bd5c47d5105701a2a686ab75eb85f9facd3cffa57a4168b7542d46
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ClamAV as a phishing trojan. The ML classifier also strongly indicated maliciousness. The presence of external URIs and link farm heuristics suggests the primary goal is to redirect the user to 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://nipisod.ru/wb?keyword=7%20on%207%20flag%20football%20plays%20pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4450355/normal_5fc7da0a57c30.pdfIn PDF document text
    • http://ijmalan.xyz/lanexudufozusisobegap2n8f.pdfIn PDF document text
    • https://cdn.sqhk.co/tajugajobib/M3cjcjc/civil_procedure_rules_witness_statement_template.pdfIn PDF document text
    • http://24goodstore.site/black_and_decker_thermoelectric_refrigerator_not_cooling49geh.pdfIn PDF document text
    • http://vipadminler.org/tarugikatobugonaxugexusesje14.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475861/normal_6026f489811e6.pdfIn PDF document text
    • https://pevunefimexog.weebly.com/uploads/1/3/1/0/131070247/keminerorosevesoder.pdfIn PDF document text
    • https://larulukesulugu.weebly.com/uploads/1/3/4/3/134305666/2618572.pdfIn PDF document text
    • https://tumafikajenama.weebly.com/uploads/1/3/5/3/135326798/15a63645.pdfIn PDF document text
    • https://nudabixe.weebly.com/uploads/1/3/4/5/134505388/pajala-lunad-waxufeve-mubopo.pdfIn PDF document text
    • https://cdn.sqhk.co/bupewazadufa/ghwicic/bopewepogokewezuxibu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481516/normal_60496b353e96a.pdfIn PDF document text
    • http://fortuneocredit.com/super_bomberman_r_online_co_op8oyme.pdfIn PDF document text
    • https://luvofebujapima.weebly.com/uploads/1/3/0/9/130969865/3204596.pdfIn PDF document text
    • https://zumokijux.weebly.com/uploads/1/3/5/9/135966910/beb924fd.pdfIn PDF document text
    • http://mikrotikwizard.com/lyrica_drug_information_sheetstq9cp.pdfIn PDF document text
    • https://xalitizamer.weebly.com/uploads/1/3/4/8/134863297/ronewepefor_kesezuxake_fikewoz_fomixunajuroxid.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
    • https://s3.amazonaws.com/voxulija/bongo_fleva_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/voxipanovigepiv/cinderella_imdb_parents_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/xunilukegez/rijabuvexanenugubu.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_off0000d8bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8BC 4960 bytes
SHA-256: aa056411510096848c46f25ecb794db9635bd3b1319fc8b696bd7afd7f1cfe83
font_01_sfnt_off0000e9aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9AA 10444 bytes
SHA-256: 47c2a686a562719a2ea34b6bb5990234e7c7164c62cbf8f876fdf2e7f1ba5019
font_02_sfnt_off00010d61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D61 4324 bytes
SHA-256: 781b9fae2fb9201b4a05d2041fea553bb2973f1d011ab9c51e3326c72e342c60

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