Malicious PDF — malware analysis report

Static analysis result for SHA-256 248bbd36499f8735…

MALICIOUS

PDF

74.8 KB Created: 2021-03-13 16:10:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 9acf49e98beabd08069e54acd08156e4 SHA-1: 10bb3bf85f8cb7fb14237697fde0d515a16c529c SHA-256: 248bbd36499f8735288930b21b0ad074e223d50f559408ed4b675e38b3d84e32
134 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a ClamAV detection and an ML classifier. It contains numerous embedded URLs, with a notable heuristic indicating it's a link farm on disposable hosting. The presence of a 'download button' heuristic suggests a social engineering lure to trick users into clicking on malicious links, such as the provided URL pointing to a potential second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://bologen.ru/strik?utm_term=navistar+dt466e+torque+specs PDF link annotation
    • http://naturmilans.fun/nivunewevixam6xecd.pdfIn PDF document text
    • https://kofetasug.weebly.com/uploads/1/3/0/8/130874362/luluvozixovepax-ribowefekizazo-wolajaj.pdfIn PDF document text
    • https://subilitukufune.weebly.com/uploads/1/3/4/6/134629352/jonepubonap-kagot-sazuketafu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383131/normal_5fcc09e3330da.pdfIn PDF document text
    • http://1-bog.ru/dotajikejisikokulujl6wrf.pdfIn PDF document text
    • https://pofemazavuson.weebly.com/uploads/1/3/2/3/132303373/xajakuno.pdfIn PDF document text
    • http://repair-planshetov.ru/742143004330pkj2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453342/normal_60380a6c42f20.pdfIn PDF document text
    • https://wavinibavuma.weebly.com/uploads/1/3/1/3/131398010/wifixuv.pdfIn PDF document text
    • http://espacecmb.xyz/computer_bill_format_in_word_with_gstk7ny6.pdfIn PDF document text
    • https://lenololiwi.weebly.com/uploads/1/3/4/4/134455370/zevalufizozonitajufi.pdfIn PDF document text
    • https://kafememum.weebly.com/uploads/1/3/4/6/134616831/e115a4e4a5deca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404308/normal_5fd6fd83722ae.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://aed022ca-8a9d-452d-9022-56a74a585a14.filesusr.com/ugd/4d548e_84aa1d3889034d6a965c5be46c4a9a65.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/bdd9dce4-672b-4be4-92ed-b939963a3fbf/winchester_model_94_trails_end_takedown_rifle_in_30-30_win.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1da89b12-63a0-4491-ac7c-d227b20815db/how_does_the_secret_dare_to_dream_end.pdfIn PDF document text
    • https://6593eeda-10fe-4128-810f-cbbc79f0a4f8.filesusr.com/ugd/c0a4bf_bf6866baef284d00919fb55644e93ca9.pdf?index=trueIn PDF document text
    • https://c5e26362-acc3-4c40-9db4-ce0cbd355080.filesusr.com/ugd/681527_c1d0838e187a4e91bab6a3167268b5a2.pdf?index=trueIn 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_off0000da66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA66 5208 bytes
SHA-256: 61b4baa39f42bb83075dd4b07074023bd1f9cafc31fde74ed7ad08c000d24a36
font_01_sfnt_off0000ec3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC3E 10452 bytes
SHA-256: 3932c1e83a2291f211688b9e893a77a3b6930bffafdf16a7e519f40530e4adbd
font_02_sfnt_off00010fc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FC9 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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