Malicious PDF — malware analysis report

Static analysis result for SHA-256 84e8c95930d8a135…

MALICIOUS

PDF

81.1 KB Created: 2021-03-03 11:20:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 26148bea2b5f08a28d5e3bb4287606d9 SHA-1: 697107e1025f61f6ceb1595a6b405e14251c77a8 SHA-256: 84e8c95930d8a13542ebe8d221c8a2f164b0fda7c9feb8c352687935ca4d262f
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spam operation. The embedded content, though heavily obfuscated, appears to be related to search queries, further supporting the lure of a search result. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://lozipotod.ru/award?keyword=how+to+share+memory+on+facebook PDF link annotation
    • https://jowetirepenu.weebly.com/uploads/1/3/1/3/131383619/dekakekuzubefim_jonibuv_dasugin_litalese.pdfIn PDF document text
    • https://kitejunozog.weebly.com/uploads/1/3/4/3/134319277/legalejusipizuni.pdfIn PDF document text
    • https://bijimuxe.weebly.com/uploads/1/3/4/8/134886115/5550688.pdfIn PDF document text
    • http://ruvujagefeko.mygamesonline.org/85823797403.pdfIn PDF document text
    • http://xuzerujagojagip.scienceontheweb.net/itll_be_alright_meaning.pdfIn PDF document text
    • https://tefafovok.weebly.com/uploads/1/3/4/5/134588422/fagedowimupafap_bojizunize_pisokopokolar.pdfIn PDF document text
    • http://kikababono.mywebcommunity.org/craftsman_garage_opener_replace_battery.pdfIn PDF document text
    • https://xevusopavavi.weebly.com/uploads/1/3/4/6/134632984/mixojitixofeku.pdfIn PDF document text
    • https://nupowanekajotut.weebly.com/uploads/1/3/0/8/130815303/6927396.pdfIn PDF document text
    • http://kaxiwemusemoj.mypressonline.com/hobart_handler_190_parts.pdfIn PDF document text
    • https://dolilufaxeni.weebly.com/uploads/1/3/2/6/132683246/jetet_babufuk_xijulefefewope_linubeja.pdfIn PDF document text
    • https://vosojexurixug.weebly.com/uploads/1/3/1/0/131070535/pimewuxefuvili.pdfIn PDF document text
    • http://fovoxarofej.getenjoyment.net/67660393593.pdfIn PDF document text
    • https://fafamamijusoma.weebly.com/uploads/1/3/4/3/134371196/tirag_lexonisotajakar_laxasikirodez_xokigamurilog.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/bepukuba/satta_king_desawar_gali_ki_report.pdfIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/nipezudasitijawo.pdfIn PDF document text
    • http://podekorutad.rf.gd/land_purchase_and_sale_agreement_template.pdfIn PDF document text
    • http://gezewezelatemak.epizy.com/aalborg_sygehus_syd_information.pdfIn PDF document text
    • https://s3.amazonaws.com/zalomi/tetibevom.pdfIn PDF document text
    • https://s3.amazonaws.com/zumomasugipeno/fimetawerumusebi.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_off0000f366.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF366 5188 bytes
SHA-256: 79ccfdaf16168928a2e47ca59d8fd9a3efeeb9811f58dd66ab34e106016cca62
font_01_sfnt_off000104f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104F2 10380 bytes
SHA-256: 0374b93cefde8972edd8041efee8e7cbdb49165db5bfba932bdb1417822da83c
font_02_sfnt_off00012888.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12888 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c