Malicious PDF — malware analysis report

Static analysis result for SHA-256 0abc10a82ad95f0e…

MALICIOUS

PDF

94.0 KB Created: 2021-04-04 19:32:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 01c8260d2102c1907c009d761fc606b0 SHA-1: 460bc0da4f0973764cdfddbaab9f8ee9b36facec SHA-256: 0abc10a82ad95f0e8c673742bed3bb443ed1d5232cdbdcce200f4fe6b97524a8
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, suggesting a phishing or SEO manipulation tactic. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and numerous external URLs point towards a malicious document, likely a spearphishing attachment, designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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 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.
  • 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/strik?utm_term=iei+2000e+keypad+programming PDF link annotation
    • http://vykupavto54.ru/zidewegokejs5.pdfIn PDF document text
    • http://in-arenas.com/inlay_router_templatesc8hhl.pdfIn PDF document text
    • http://fuzubijixulux.mygamesonline.org/1434763943.pdfIn PDF document text
    • http://reduslimitaly-official.site/82724013642d7867.pdfIn PDF document text
    • http://zofugef.mypressonline.com/rerejotakop.pdfIn PDF document text
    • http://dimopun.mywebcommunity.org/47399375640.pdfIn PDF document text
    • http://mebevevi.mywebcommunity.org/administrao_financeira_ross.pdfIn PDF document text
    • https://majosipodolonax.weebly.com/uploads/1/3/0/8/130814003/5693105.pdfIn PDF document text
    • https://kewojuposadut.weebly.com/uploads/1/3/4/3/134374438/fazetodiv-vujezomivi-tagoromefus.pdfIn PDF document text
    • https://batusapetedovug.weebly.com/uploads/1/3/0/8/130873971/cadbc3d835d3964.pdfIn PDF document text
    • http://wejesigozolireb.getenjoyment.net/34582326829.pdfIn PDF document text
    • https://piborubaladedos.weebly.com/uploads/1/3/4/7/134764427/sasibekemibolofem.pdfIn PDF document text
    • http://like-store.site/top_paw_double_door_crate_instructionsqfe57.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://90ff81fc-98d9-4e53-96a3-aaa5c1c2042e.filesusr.com/ugd/bb5aff_16ee005d37554a42ae1c9c1280394b95.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wizuluworafid/wekejix.pdfIn PDF document text
    • https://e905a76e-7bc1-418c-be29-e8eda1603e86.filesusr.com/ugd/3fb32a_60e9334032ab473397fa7cdfc0ce75b2.pdf?index=trueIn PDF document text
    • http://zofawuzimiva.rf.gd/almost_is_never_enough_piano_chords.pdfIn PDF document text
    • http://jaxarafepemu.epizy.com/topironodowepufax.pdfIn PDF document text
    • https://5a2ada08-5b6c-402a-b0df-3636415b461e.filesusr.com/ugd/434ae6_4e13f03ce99f404e8ec123772d8255a7.pdf?index=trueIn PDF document text
    • http://voxibamad.epizy.com/lidozaferajexifonukanuni.pdfIn PDF document text
    • https://8641c524-1fb5-4292-87ed-dd72f64d6c22.filesusr.com/ugd/9b7d8a_06591bf3f7854b9c9c5f6edec1c38c84.pdf?index=trueIn PDF document text
    • http://xulelaperimiku.epizy.com/vefaxugajotatizibara.pdfIn PDF document text
    • https://18b62485-dce0-4e35-9712-b1d1f13fcb23.filesusr.com/ugd/296484_6b23bd497ae04dc499a6bcbc022d95e8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wuvepilamamuse/hollywood_movies_sites_best.pdfIn PDF document text
    • https://s3.amazonaws.com/xufoxorog/magic_tree_house_books_online.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_off00012f04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F04 5448 bytes
SHA-256: f567d53d7017de5b2636d6ed2465214a91812bbd06eeee958995614d8c95bc0c
font_01_sfnt_off00014187.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14187 12084 bytes
SHA-256: f0be26171ac5f4fc0e76bf2717a330e7e99779acc81f4f6565741083729d0a41