Malicious PDF — malware analysis report

Static analysis result for SHA-256 febe3e3e45260f09…

MALICIOUS

PDF

112.8 KB Created: 2021-04-21 06:35:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 9d29a3c3231aec7facc17075e92b6d3c SHA-1: 4cbf08fa97cce491290b52f7aff949e0771addfc SHA-256: febe3e3e45260f0934586e932ebfe7f0994c86001a8d41bbb2be39afdc2ee341
126 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains numerous external URIs, with a prominent one pointing to 'https://botokaw.ru/strik'. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of external links and the ML classifier output strongly suggest a phishing or malicious redirection attempt. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://botokaw.ru/strik?utm_term=american+gods+cast+season+2+donar PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4496372/normal_604213e418a28.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481154/normal_5fd8aec011b15.pdfIn PDF document text
    • http://nakidki-alkantara.xyz/el_gen_egoista_extendidoqls1m.pdfIn PDF document text
    • http://kepuxom.mypressonline.com/campanella_liszt.pdfIn PDF document text
    • https://severuzilun.weebly.com/uploads/1/3/4/7/134710190/kumobabizav.pdfIn PDF document text
    • https://tikomonanuso.weebly.com/uploads/1/3/4/2/134266270/xutuji-zumawebud-fewufus-fivarepazewezaj.pdfIn PDF document text
    • http://internet-babki.ru/how_to_make_your_own_gymnastics_bar_at_home21lwa.pdfIn PDF document text
    • http://dutusejutax.22web.org/sheet_bai_hat_khuc_thuy_du.pdfIn PDF document text
    • https://zoninezazazi.weebly.com/uploads/1/3/1/0/131070362/2786164.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420586/normal_601d83cec92f2.pdfIn PDF document text
    • https://fapadeli.weebly.com/uploads/1/3/4/4/134445247/e2f9541ba7dd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369334/normal_60081bec87db4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458413/normal_605c39bbe1ace.pdfIn PDF document text
    • http://zahlungsservice-ch.site/what_age_is_moshi_twilight_fori07v5.pdfIn PDF document text
    • http://sewatumafuta.medianewsonline.com/system_performance_brendan_gregg_download.pdfIn PDF document text
    • https://domazatavaxagit.weebly.com/uploads/1/3/0/7/130775902/novapajukasopo.pdfIn PDF document text
    • http://buylettersonline.com/etsy_logo_template89uvb.pdfIn PDF document text
    • http://mevilesiroxivo.iblogger.org/padagexibimugak.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://girifej.epizy.com/98909518312.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8791536c-bced-43b8-b18b-0f47670ab730/is_dragon_ball_manga_still_going.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d593ad64-21bb-4f28-9cc9-d842e51a02f8/how_to_look_up_my_nursing_license.pdfIn PDF document text
    • http://wobemiko.epizy.com/ich_guidelines_stability_studies_ppt.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eaa8b703-77f0-4685-a156-d37ad4c9b59b/risovir.pdfIn PDF document text
    • http://wunitawuzufif.epizy.com/geometry_vocabulary_quiz_2009_board_of_regents_university_of_nebraska_answer_key.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_off00017c5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17C5F 5348 bytes
SHA-256: 08f9261bb6550a63fdfe9bd48d7ee67cdf432385dd9e9ecd0875087e95eb10ff
font_01_sfnt_off00018e76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18E76 11060 bytes
SHA-256: d1bb1d899d949646a12d381ee1e30fb7c3ddcc118c6fae203ce311df88d6ed7e