Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e4834cacf51ea80…

MALICIOUS

PDF

75.6 KB Created: 2021-04-20 18:15:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: a3b3c590e5a26ede3ff6ba403a15b4ba SHA-1: d017629fc2241ee9ddafa086eb269447236988d7 SHA-256: 6e4834cacf51ea809eefd017042c13609639ae858197dc23d491d3dcf4cff13c
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with at least one pointing to a suspicious domain ('ponafet.ru') and another to a potentially malicious PDF ('tronreserve.online'). The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the PDF is designed to host many links, likely for SEO manipulation or to distribute malware. Although no scripts were explicitly extracted, the presence of external URIs and the overall detection profile strongly suggest a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://ponafet.ru/strik?utm_term=2006+honda+odyssey+alternator+cost PDF link annotation
    • http://tronreserve.online/73800622245nxekf.pdfIn PDF document text
    • https://sibevuguz.weebly.com/uploads/1/3/4/8/134859718/5086467.pdfIn PDF document text
    • https://misutinulil.weebly.com/uploads/1/3/1/4/131407711/vivewi.pdfIn PDF document text
    • https://rebageronamit.weebly.com/uploads/1/3/0/7/130775484/2962255.pdfIn PDF document text
    • http://tiktokhd.design/harry_potter_and_the_sorcerers_stone_full_movie_castm36sy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366032/normal_605aaf2f114cc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449998/normal_5feb041041a44.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420588/normal_6068ab9c01a80.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493545/normal_604b4ecb08680.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418584/normal_60090c612eeb3.pdfIn PDF document text
    • https://jetovalanowu.weebly.com/uploads/1/3/0/7/130739462/geweli.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423188/normal_5fc94fe303349.pdfIn PDF document text
    • https://zugimawaxudal.weebly.com/uploads/1/3/1/4/131410952/vozupafobona.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368996/normal_602c11dc8638a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mibelajute.epizy.com/4536238780.pdfIn PDF document text
    • http://muxobuduxude.epizy.com/centos_directory_server_administration_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/jupevuxirapi/what_is_the_moral_of_the_fable_of_the_tortoise_in_things_fall_apart.pdfIn PDF document text
    • http://vavuzudimolig.rf.gd/43223141442.pdfIn PDF document text
    • http://bodapefazit.rf.gd/autoroute_2013_gratis.pdfIn PDF document text
    • http://dupumimegijema.epizy.com/acgih_tlv_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/dobikasukavu/balkh_province_map.pdfIn PDF document text
    • https://s3.amazonaws.com/rafiralexezol/riwavi.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_off0000e832.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE832 5464 bytes
SHA-256: c0a3350edbe1155269218fd8a953190231cad816f311e3832333db30d87bf562
font_01_sfnt_off0000fac4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAC4 11672 bytes
SHA-256: e773d1eae3e65855ed1aea3c93560e66bc052a9164322a273cc2711c2ddbd322

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