Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d48c59540e74938…

MALICIOUS

PDF

77.5 KB Created: 2021-03-11 16:16:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 6802687386c2d4ec3f7893fe4b141a0f SHA-1: 2607d7263e9aa3a9d371d933b21ad89dac86c607 SHA-256: 7d48c59540e74938ad19f399031c8c0a3a7ca0940302413562937df05c37889c
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. It contains numerous embedded URLs, with a primary suspicious URL being https://bologen.ru/award?keyword=cersil+bu+kek+siansu+pdf. The document body, though heavily obfuscated, suggests it is intended to appear as a PDF document, likely as a lure for phishing or to download further malicious content.

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://bologen.ru/award?keyword=cersil+bu+kek+siansu+pdf PDF link annotation
    • http://zorebagexibakom.22web.org/leg_muscle_building_workouts_without_weights.pdfIn PDF document text
    • https://cdn.sqhk.co/puvubuzu/Jo0Gzgi/car_art_wallpapers_hd_for_desktop.pdfIn PDF document text
    • https://cdn.sqhk.co/refowofiros/jh9hher/giwinotevabafedonitis.pdfIn PDF document text
    • http://jolixasij.sportsontheweb.net/64523444155.pdfIn PDF document text
    • http://xunarepozufuz.mygamesonline.org/furinno_abbott_corner_computer_desk_with_bookshelf.pdfIn PDF document text
    • https://cdn.sqhk.co/xixujipum/hdgdjd3/figafimosumur.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zimadiwiv.rf.gd/50310455222.pdfIn PDF document text
    • http://pibowaloboko.rf.gd/vehicle_bill_of_sale_alabama_template.pdfIn PDF document text
    • https://8c56b32b-3398-45d6-9c0b-b55146621f16.filesusr.com/ugd/6924eb_336fce2b913d4b99966d02b12557210c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1bc2ba6-a534-4748-9cdf-d29663276987/bizofikojigef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34b4f1a8-fdaf-4a7c-b47a-fe7b59e10b2d/price_of_samsung_smart_tv_55_inch_in_india.pdfIn PDF document text
    • http://guturiwukazog.rf.gd/firofoxusetanotan.pdfIn PDF document text
    • https://367e539a-c541-4439-991c-4bf2bef2aa7a.filesusr.com/ugd/77d535_327b8d188b844cda9fc7f83d020edb78.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0307ab6b-9556-4394-9d2f-4767ef6905f6/how_to_pair_anker_soundcore_headphones.pdfIn PDF document text
    • http://zipemoluligera.myartsonline.com/wixenuteveborumadituxigi.pdfIn PDF document text
    • http://lojiwifi.epizy.com/bowers_beach_de_fishing_report.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_off0000d8c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8C1 7780 bytes
SHA-256: 37a806a490df23ef91f011006baf89cca7b81a38408b0ebe00f2954bc9e12d22
font_01_sfnt_off0000f258.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF258 5144 bytes
SHA-256: 9464f4c8512ad997298f7a1eadb8dbe84a88aba2eafb48f42a751ad937b73ff2
font_02_sfnt_off000103de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103DE 10400 bytes
SHA-256: 93295cfd5bb276f70290e39f88e0ba784070e203ff14bd60de19aeff21af1635

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