Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ff9f4e116ce8a12…

MALICIOUS

PDF

78.9 KB Created: 2021-03-31 14:22:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 1a2211c7ff74434a9952c192e98506ad SHA-1: 513289bd2b069616bd0955ffa4bd407539fd4b38 SHA-256: 1ff9f4e116ce8a12546c8706f851f18d868cbd67d2f6e78318b40622a56f8234
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to trick users into visiting a malicious site. The document body, though heavily obfuscated, appears to be a lure related to PDF search terms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://ponafet.ru/award?keyword=augusto+monterroso+cuentos+pdf PDF link annotation
    • https://cdn.sqhk.co/vutenugade/CjbsEgh/carpigiani_191_psp_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/bisidilit/jgdDjbr/world_market_furniture_dining_table.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478664/normal_60213fb80c4fd.pdfIn PDF document text
    • http://tarigutese.mygamesonline.org/hospital_administration_bm_sakharkar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366408/normal_60200254055ff.pdfIn PDF document text
    • https://cdn.sqhk.co/podiwilur/p7Ahegf/starlink_launch_schedule_2019.pdfIn PDF document text
    • http://nateribebomulaz.medianewsonline.com/the_norton_anthology_of_short_fiction_shorter_8th_edition.pdfIn PDF document text
    • http://kogejirupu.getenjoyment.net/monepopatapeveruxon.pdfIn PDF document text
    • https://cdn.sqhk.co/feduvefas/jdzjaQG/racing_underground_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453575/normal_5ff40f66e6444.pdfIn PDF document text
    • https://cdn.sqhk.co/vuvapolaxaj/jq4bFuW/zara_home_customer_service_canada.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7899f6e-20ae-488d-9da7-2d903360aab2/legesukexojosogewagagipuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a75fd8c4-649e-49cf-8809-6cb397b11617/gurilixun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88cd2df4-a29a-43f9-b481-8fbe1e8ce552/why_is_my_dyson_v8_not_holding_a_charge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7192f5e-a192-4dac-a8db-d1596d4f0ba2/7336372164.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2465a56-c3f5-4c29-a716-9c94e47616a0/vojabubawonen.pdfIn PDF document text
    • http://rizivubonulej.atwebpages.com/zodesavidijudenoweza.pdfIn PDF document text
    • https://s3.amazonaws.com/kujapomib/skill_vs_skill_set.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00f78bee-1c6e-4d79-8fc5-8fe2bce9e3dc/craftsman_gold_6.75_lawn_mower_blade_size.pdfIn PDF document text
    • https://s3.amazonaws.com/sirilagewuga/31008315059.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a08e276e-fa5f-4f62-ad59-227a57d0f789/zifevumipalenipamiwijejed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd20f5f3-4025-4e33-8001-9fcb8265dc30/starcraft_boats_for_sale_mn.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97b14d25-fac6-49ac-9bff-7d8bf7ed9200/55546364087.pdfIn PDF document text
    • https://s3.amazonaws.com/busutafitufe/tugimesatuxawamebagavu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25834717-1d7f-41d7-bfb2-07dbe1acd548/proform_xp_crosswalk_580_treadmill_manual.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_off0000f475.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF475 5224 bytes
SHA-256: dae446b67289d2c94ade47d8c8842506a46fa6a4a3e1e08319c4bed41a7bc6c4
font_01_sfnt_off00010633.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10633 12340 bytes
SHA-256: f9b4322a20b87d9d7f2aef0cabd495662a4edf07f7af484dd06c62a86f9c7b76