Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1529c0423957802…

MALICIOUS

PDF

82.6 KB Created: 2021-03-01 15:58:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 84d6bd018260f5d8ebf34988385857ad SHA-1: cc13bee402321043bbba3cb7d72a52b08f216278 SHA-256: d1529c0423957802f6afeb0b64b84e42fa372c1eb4f3d0c7a9b85aac838575b7
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, with a significant portion pointing to disposable hosting and potentially malicious domains like 'pelibifir.ru' and 'manthoughtswebsite.website'. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests the document's purpose is to act as a deceptive link farm, directing users to external, untrusted resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://pelibifir.ru/wix?keyword=bookworm+popcap+apk PDF link annotation
    • http://manthoughtswebsite.website/remove_address_from_ups_my_choicea40p0.pdfIn PDF document text
    • http://tafugegajotu.mygamesonline.org/firex_hardwired_smoke_detector_installation.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367311/normal_6013bc99091bf.pdfIn PDF document text
    • https://mamapesuwilataj.weebly.com/uploads/1/3/4/8/134857931/2516496.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503533/normal_5fda46d11d4e3.pdfIn PDF document text
    • https://bakovumosu.weebly.com/uploads/1/3/4/6/134679162/pukimakom.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420602/normal_602573a7be0cc.pdfIn PDF document text
    • http://kinorio5.xyz/76713648999sehw5.pdfIn PDF document text
    • http://gnoogle.site/psychology_books_for_sale_collegeg69u4.pdfIn PDF document text
    • https://wamedota.weebly.com/uploads/1/3/0/8/130814674/4392873.pdfIn PDF document text
    • http://magnetfix.store/michael_burry_net_worth_200898rax.pdfIn PDF document text
    • http://svarka-aurora.online/681373870933gt4f.pdfIn PDF document text
    • https://zogadinarele.weebly.com/uploads/1/3/1/4/131409244/gesinutavuwaxiv_notixebeleje.pdfIn PDF document text
    • https://ligofaxudatejot.weebly.com/uploads/1/3/0/7/130739538/faxonisupubosiwal.pdfIn PDF document text
    • http://psychologyrelax.xyz/kodiak_truck_tent_for_saleuyqux.pdfIn PDF document text
    • https://wilumixomili.weebly.com/uploads/1/3/1/4/131483065/531404.pdfIn PDF document text
    • http://heretythere.site/tulukaxelibivufolekaxcz9b8.pdfIn PDF document text
    • https://viramerobudob.weebly.com/uploads/1/3/1/4/131483281/xavufarejiboko.pdfIn PDF document text
    • https://gamajebijapam.weebly.com/uploads/1/3/1/8/131856653/2850998.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kuwijiti.myartsonline.com/dewalt_miter_saw_12_inch_parts.pdfIn PDF document text
    • http://lejiletuvasipib.onlinewebshop.net/rca_rcrn04gr_universal_remote_codes.pdfIn PDF document text
    • http://sanugifop.atwebpages.com/logic_pro_x_shortcuts_free_download.pdfIn PDF document text
    • http://mukanebesiva.atwebpages.com/darwin_origin_of_species_abebooks.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_off000107e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107E6 5072 bytes
SHA-256: d6e38214c2d123949052b8e10e60a2cac3ee6d309b3b5fa876fce65829de641e
font_01_sfnt_off00011928.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11928 10544 bytes
SHA-256: 64c7f304b8facf5b9b1d0df1ceff1f9d30715f583ff3c2ce529368b16c8610f5

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