Malicious PDF — malware analysis report

Static analysis result for SHA-256 9782e8b4cf9700c0…

MALICIOUS

PDF

80.4 KB Created: 2021-03-19 06:43:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 70994e6188e49a27cbff56a9835f07d5 SHA-1: 216824427efdb8bbd1979fde06f55f0bf84b9999 SHA-256: 9782e8b4cf9700c0ef3b92a8d547c58734aa852b0ae12aef8297764b63d569c6
126 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, including one that appears to be a link farm on disposable hosting, and another that mimics a search result for a cookbook PDF. The presence of these links suggests an attempt to redirect users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://gimoguvi.ru/wix?keyword=nobu+cookbook+pdf+free PDF link annotation
    • http://shopsupergood.site/androidx_appcompat_spinnerdsbh9.pdfIn PDF document text
    • https://cdn.sqhk.co/dojaxeje/hh3ijii/diy_rockstar_costume_female.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427828/normal_5fffd9abbe427.pdfIn PDF document text
    • http://persequenteamsohbet.com/72442047647vnz73.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426971/normal_5fd33469148b2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393369/normal_60035ec1ef800.pdfIn PDF document text
    • https://cdn.sqhk.co/vatepasoxi/heQh5dV/board_of_directors_in_corporate_governance.pdfIn PDF document text
    • https://cdn.sqhk.co/vonezositixi/8pVujfR/castle_of_illusion_cheats_sega.pdfIn PDF document text
    • https://cdn.sqhk.co/budatumibowu/hbCPqhK/vengeance_rpg_android_review.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://4a5660cc-52a2-48ff-9acb-4b4f1704cb6e.filesusr.com/ugd/81868d_fd73bef8cecc4e86b2f9a45563b5b630.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/615f8635-629c-4700-8e98-8f090e4b3ed7/69567214225.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c451e6a4-2d5a-4263-82be-3b1f524f2357/nanda_nursing_diagnosis_list_for_anxiety.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef6374ba-7626-4e58-9236-cea3a10cce83/13557335338.pdfIn PDF document text
    • https://4ceac43d-3374-4736-8926-b47930641487.filesusr.com/ugd/3b1191_6bbd8a98e72948588543c51e5bab0bff.pdf?index=trueIn PDF document text
    • https://7ef5d8b8-74ac-4e0a-b0a0-fa61ca6462a8.filesusr.com/ugd/23e9be_6a63c3f9dc384b9983b1883842ca0e9b.pdf?index=trueIn PDF document text
    • https://b6c9d0de-81a1-4db9-ab7d-8a95af9e63d6.filesusr.com/ugd/b28ae2_936997f54ae449f192874dcc593faed7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/edbd789f-8026-4111-81c1-d92077786e88/roxorunutiwipidaj.pdfIn PDF document text
    • https://01c4c9a3-ee74-4db9-a65d-799443b8dbf1.filesusr.com/ugd/a64c8c_446cd10c004847e78308b17ec8877c33.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7eacfcd-143b-4d3d-a423-c663794a757a/84644993254.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f2bcd9b-5196-4a44-b1ec-d34e09bc0ca0/how_to_get_ccrn_certified.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_off0000fd78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD78 4900 bytes
SHA-256: bbadcfe1fca6c348ed89965561a4052b97e10076f7d415bdc548e05dacd19868
font_01_sfnt_off00010e3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E3C 11348 bytes
SHA-256: 79792363701034431406012592d7055684b2f61f31e2fd641d53e07bec9f2ac4

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