Malicious PDF — malware analysis report

Static analysis result for SHA-256 88c17027372a184a…

MALICIOUS

PDF

83.8 KB Created: 2021-03-20 10:16:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: b6b9ca7ec4e06b4648cbcb5998fd5ab5 SHA-1: e8f081c6b9c436c47546e78f02c9089b5e1905bb SHA-256: 88c17027372a184a189c86d0e0b3c71b7a4d40e24242f5b3d16fb13d50c99027
134 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

Heuristics 6

  • 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.
  • 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://nipisod.ru/wix?keyword=edison+professional+m4000+manual PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4498994/normal_6001cfa40e9e3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424996/normal_5ff8c22f802fd.pdfIn PDF document text
    • https://galofufe.weebly.com/uploads/1/3/1/3/131384583/tutenuleru-bufapikosutix.pdfIn PDF document text
    • https://cdn.sqhk.co/mapiwoda/gfgeJhh/when_does_boomerang_come_back_on_bet.pdfIn PDF document text
    • https://cdn.sqhk.co/zogobadakedu/iffjbq8/the_top_up_grant.pdfIn PDF document text
    • https://cdn.sqhk.co/gupimupiset/je25E8i/gujamekemikageneti.pdfIn PDF document text
    • https://cdn.sqhk.co/xotolodi/PdihjeG/gartner_magic_quadrant_web_application_firewall_2020.pdfIn PDF document text
    • https://mozevosiku.weebly.com/uploads/1/3/3/9/133999333/metepazetep-zudovadojagotum-wugivozupupel-xozatepexut.pdfIn PDF document text
    • https://girawosanisab.weebly.com/uploads/1/3/0/7/130740609/fexofizokiwefovovi.pdfIn PDF document text
    • https://paluwewokob.weebly.com/uploads/1/3/2/7/132712057/ffa9aa3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494431/normal_6048e067e8f80.pdfIn PDF document text
    • https://tubolapibakosi.weebly.com/uploads/1/3/4/8/134872187/wazat_tijukule_kupatimaned.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500432/normal_5fdff4947593b.pdfIn PDF document text
    • http://gimatadokij.mygamesonline.org/anemia_ferropenica_microcitica_hipocromica.pdfIn PDF document text
    • http://pozezan.mygamesonline.org/aprendiz_de_bruja_witch_willow_gratis.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/sudevejerifu/wuvevigawaxifewetu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/801f9bed-edd5-41bc-bdc2-53b6fd0ee02c/malixujutuxojuvisimofaxo.pdfIn PDF document text
    • https://s3.amazonaws.com/gomakobez/empty_calendar_template_october_2018.pdfIn PDF document text
    • http://nevabaza.atwebpages.com/wovibulibokevasekuvano.pdfIn PDF document text
    • https://s3.amazonaws.com/nijudow/catia_v5_64_bit_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wukevirenesu/single_column_cash_book_questions_and_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7938886-7b54-4b00-b6d1-f31f9d56b881/94598233894.pdfIn PDF document text
    • http://zuxokoberibaw.atwebpages.com/69601775941.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba02cdd1-3f79-40d9-b9a3-855be05730ff/how_to_fix_my_samsung_refrigerator_freezer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fc77f26-674a-4b32-869a-d1e6a4f5b904/13871862004.pdfIn PDF document text
    • http://kosezofejesuxef.atwebpages.com/what_is_bcm_ar_15.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73ded613-4480-4b68-8a30-a7caf166a7f6/what_are_the_types_of_resistance_exercises.pdfIn PDF document text
    • https://s3.amazonaws.com/wolawatin/9218419199.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_off0000fadb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFADB 5176 bytes
SHA-256: 85c092f5da1e1d2c83dffa8f7558b8a0d717b5d5a34d8d9155bbbaa0daf29d32
font_01_sfnt_off00010c56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C56 11392 bytes
SHA-256: 52e1b9b7aa8927bef4a64de4961e799d48a67c66c6e6ab8e3bec5b59bf36d7c8
font_02_sfnt_off00013337.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13337 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2