Malicious PDF — malware analysis report

Static analysis result for SHA-256 f57b3ce351447490…

MALICIOUS

PDF

77.9 KB Created: 2021-05-08 04:01:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: a3b86867f625f1568f97ffa5a7ad5da7 SHA-1: 21b85b796b001ca57c67b3bd6b5ad0539d4daefb SHA-256: f57b3ce35144749095df39a454872dc5585b9c6ba7b5db200bc3b1252680b1eb
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically pointing to a domain associated with a 'Verizon lte home internet router manual' lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for multiple links, suggesting a phishing or malware distribution scheme. ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious classification.

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://midufefew.ru/strik?utm_term=verizon+lte+home+internet+router+manual PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4489586/normal_5ffcda29c923d.pdfIn PDF document text
    • https://cdn.sqhk.co/kidimezamos/eifhgjb/grand_theft_auto_vice_city_xbox_1.pdfIn PDF document text
    • https://cdn.sqhk.co/xivovido/ZDgiTjf/97802380094.pdfIn PDF document text
    • http://gokawojop.scienceontheweb.net/99097308654.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402712/normal_5fed30f2d373d.pdfIn PDF document text
    • http://fulifubajamo.mywebcommunity.org/15564406110.pdfIn PDF document text
    • https://cdn.sqhk.co/jojojidatun/PgdY7gi/monukiwelusofekujasali.pdfIn PDF document text
    • https://cdn.sqhk.co/tinukomafiro/bVzjdov/chemical_elements_contain_carbohydrates.pdfIn PDF document text
    • https://cdn.sqhk.co/woberimi/LhgXOia/somokisefakovurutekaxis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378153/normal_60144dfc38023.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382418/normal_606e905aa80dd.pdfIn PDF document text
    • http://xijipeva.mypressonline.com/63064491811.pdfIn PDF document text
    • https://cdn.sqhk.co/rijomawonuj/gGihjh2/metivugovinufumijanufo.pdfIn PDF document text
    • https://cdn.sqhk.co/vivupedasez/Lhjijgj/wonizowevedelifimagetuba.pdfIn PDF document text
    • http://ruwufuwetoj.mygamesonline.org/how_to_add_formula_in_openoffice_writer.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://fowimifefezujo.myartsonline.com/jalakatojuvogevijupo.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_off0000e883.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE883 4644 bytes
SHA-256: 0f1e8e9b77d43941d26d6ff712d16f73add397a6b1d7082525f90b512f6fea13
font_01_sfnt_off0000f815.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF815 10636 bytes
SHA-256: 0cc4ab2ec6cd41c1e14a0540471390b4a8ae383c7aa6a6b7ad6d48a2c93fcf9e
font_02_sfnt_off00011c97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C97 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

Open this report in the interactive analyzer, or submit your own file for analysis.