Malicious PDF — malware analysis report

Static analysis result for SHA-256 f31b53934a07cefa…

MALICIOUS

PDF

72.5 KB Created: 2021-03-01 21:41:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 6fc9d88466528991a1997a0dd70d689a SHA-1: 44f32e073bd19e0739e22ae4c99cbd71720370e5 SHA-256: f31b53934a07cefaeb32a84d1d3803a2f0ffc7edfeeab5b2f29144b2375faf69
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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/award?keyword=how+to+use+sea+bond+denture+adhesive PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4389801/normal_602e99416a0e4.pdfIn PDF document text
    • http://wejowadizabudex.mypressonline.com/argumentative_essay_examples_ap_lang.pdfIn PDF document text
    • http://pofuxubilet.sportsontheweb.net/zulugabexinatugaxozidevo.pdfIn PDF document text
    • https://zilakakazaxo.weebly.com/uploads/1/3/4/4/134442972/4690890.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451744/normal_600518ba9c32f.pdfIn PDF document text
    • http://midikakuvekume.mywebcommunity.org/digozufinut.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476001/normal_5fcede87d9f8d.pdfIn PDF document text
    • https://xovobinawulum.weebly.com/uploads/1/3/4/8/134883327/sinejositaw.pdfIn PDF document text
    • https://cdn.sqhk.co/retirijozi/ggMWcFI/thrifty_car_sales_mountain_home.pdfIn PDF document text
    • http://xilexevu.scienceontheweb.net/22839183670.pdfIn PDF document text
    • http://viniveba.mywebcommunity.org/jarufi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464527/normal_6026228823633.pdfIn PDF document text
    • https://vozutadisifik.weebly.com/uploads/1/3/1/4/131483249/mowano.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497356/normal_6021ade9bd053.pdfIn PDF document text
    • https://cdn.sqhk.co/zifalulog/9ibhiia/xavejonezexabemunufolik.pdfIn PDF document text
    • https://lijoliwaxodoxi.weebly.com/uploads/1/3/1/3/131398144/de84ac3d1.pdfIn PDF document text
    • https://cdn.sqhk.co/lebapivi/C5cidUK/why_does_cytosine_always_pair_with_guanine.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
    • http://kepofif.onlinewebshop.net/my_kitchenaid_ice_maker_wont_make_ice.pdfIn PDF document text
    • http://zudupaxub.myartsonline.com/litezoxejelimu.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_off0000d0be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0BE 5016 bytes
SHA-256: 184ca429f0d0372a7dea4141c9f52f43ac439469e5338bbdb714dd014c7320b8
font_01_sfnt_off0000e1c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1C5 11000 bytes
SHA-256: eb4712de9a0a32f0ac9db7e1010f37823e959b89b07bce7d5e99e3037597901d
font_02_sfnt_off000106bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106BC 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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