Malicious PDF — malware analysis report

Static analysis result for SHA-256 6896983f93c7408f…

MALICIOUS

PDF

90.4 KB Created: 2021-05-23 08:51:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0130db7476d9313acece2582296cdae6 SHA-1: ba944d2f28b5bab1eff4838d40f5e59ca3f59665 SHA-256: 6896983f93c7408f21695bb786ad93019aa475382ccafcf2f404f5642e47bef6
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as Pdf.Phishing.Trojan. It contains an embedded URL pointing to 'nipisod.ru', which is likely used to redirect users to a phishing site or download further malicious content. The presence of numerous external links, as indicated by the PDF_SEO_LINK_FARM heuristic, suggests a link farm or spamming technique to distribute the malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/strik?utm_term=wfg+financial+needs+analysis+pdf
    • https://zopiwaseka.weebly.com/uploads/1/3/0/9/130969839/2380355.pdf
    • https://cdn-cms.f-static.net/uploads/4486521/normal_6014cee4bd76f.pdf
    • https://cdn-cms.f-static.net/uploads/4416659/normal_600c39f4ab1c8.pdf
    • https://bamegipizof.weebly.com/uploads/1/3/4/6/134647446/kodaresanuzoz_pifonuda.pdf
    • https://static.s123-cdn-static.com/uploads/4415929/normal_5fe0bb8b1f2e5.pdf
    • https://xumizobizuzu.weebly.com/uploads/1/3/4/6/134688834/virabiwape_bomutub_wutosiboz.pdf
    • https://kivomulugan.weebly.com/uploads/1/3/2/6/132695939/vefotapise.pdf
    • https://mokowevabib.weebly.com/uploads/1/3/0/7/130739664/7540749.pdf
    • https://cdn-cms.f-static.net/uploads/4496151/normal_606cfbb45f065.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/dc50f76d-5098-4ba6-94c5-dacc6dd682e5/husqvarna_yth20k46_drive_belt_installation.pdf
    • https://uploads.strikinglycdn.com/files/616bdb7f-e1f7-402e-9bcf-659713ade5a6/california_residential_lease_agreement_doc.pdf
    • https://uploads.strikinglycdn.com/files/043342d8-dced-4f53-8e9f-845229893efe/bubenizofekigujuxatig.pdf
    • https://s3.amazonaws.com/tosego/will_there_be_a_season_3_for_big_little_lies.pdf
    • https://s3.amazonaws.com/kudefem/homographs_worksheets_with_answers_for_grade_3.pdf
    • https://uploads.strikinglycdn.com/files/ddc77e8f-2f1b-478e-a47a-d90e06f28580/97965674428.pdf
    • https://uploads.strikinglycdn.com/files/a1f25e85-7c85-47f6-a148-7157fa6cbc34/ap_language_and_composition_practice_exam.pdf
    • https://s3.amazonaws.com/poresi/el_nuevo_juicio_de_amparo_indirecto.pdf
    • https://s3.amazonaws.com/zodawanuror/vietnam_fmcg_market_report.pdf
    • https://uploads.strikinglycdn.com/files/2010b398-4851-4cdc-a5a3-6890e9f454c2/how_to_use_the_deluxe_ez_bow_maker.pdf
    • https://uploads.strikinglycdn.com/files/4b1138f9-bd0c-4133-8903-6d0def798eb6/how_to_cure_chicken_pox_scars_fast.pdf
    • https://uploads.strikinglycdn.com/files/fa10f7b8-a47d-4fde-bcd9-0199911a03dc/blackburn_trakstand_magnetic_trainer.pdf
    • https://uploads.strikinglycdn.com/files/8b753e84-1244-4370-96cc-2fa153bdcf72/mireluzutimesi.pdf
    • https://uploads.strikinglycdn.com/files/50e6847f-a3e8-4b05-93e4-c8e6cd87e4f4/65968320958.pdf
    • https://s3.amazonaws.com/mozedijiz/netijepojikojobozozanowup.pdf
    • https://uploads.strikinglycdn.com/files/2ae83e0e-aa3c-48bf-b9b8-f290166f5d15/69451546028.pdf
    • https://uploads.strikinglycdn.com/files/38109fff-f9cb-4ee6-b97d-3e93529f7dda/kegavowifozosuwunapaba.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001217c.bin
d706d5fd049bcb88a354b2de9086622f3e0566cd1d0f9d88a1fbe6fe3decbcb9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1217C 5340 bytes
font_01_sfnt_off000133e1.bin
d5535dfcbe89f78fde037569de19559d39d32895ca0f3e5f27e459d6514e5a81		 pdf-font-stream PDF embedded font (sfnt) at offset 0x133E1 11072 bytes

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