Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2196af0a2fc4a18…

MALICIOUS

PDF

73.6 KB Created: 2021-03-04 21:54:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 2b40902a72b9e35ca5087f8d680db3bb SHA-1: 916ee35e293ebff17c1f4363ec7fc53e2b782208 SHA-256: b2196af0a2fc4a182167b96229512ac5ec55583042f8006f8d85f3fa5b8cc00f
186 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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://seumenha.ru/strik?utm_term=calories+and+carbs+in+taco+bell+steak+quesadilla PDF link annotation
    • https://bazafegaxu.weebly.com/uploads/1/3/1/3/131383427/9242332.pdfIn PDF document text
    • https://latolupolazu.weebly.com/uploads/1/3/4/0/134017494/nesagatirikituwex.pdfIn PDF document text
    • https://gofegupozomo.weebly.com/uploads/1/3/4/4/134479888/4797605.pdfIn PDF document text
    • https://gixunilaw.weebly.com/uploads/1/3/1/8/131856646/8376803.pdfIn PDF document text
    • https://kobetuditi.weebly.com/uploads/1/3/4/4/134446504/3665488.pdfIn PDF document text
    • https://cdn.sqhk.co/xafazunusa/gdogcgT/ghost_rider_fortnite_skin_price.pdfIn PDF document text
    • https://nerapusu.weebly.com/uploads/1/3/1/4/131438180/d6c24e926204e4.pdfIn PDF document text
    • https://bixikobitil.weebly.com/uploads/1/3/4/5/134525497/newezifawaj_zoworedarepon.pdfIn PDF document text
    • https://zenisitidijo.weebly.com/uploads/1/3/4/3/134309999/tazunodudinugejeguso.pdfIn PDF document text
    • https://cdn.sqhk.co/virurewev/Hzthfjf/mr_itou_knives_review.pdfIn PDF document text
    • https://vulazijol.weebly.com/uploads/1/3/4/6/134648863/fovigorej.pdfIn PDF document text
    • https://gavokafiwafez.weebly.com/uploads/1/3/1/3/131381231/jiluniwu_vomepapigivo_sozazevudakup.pdfIn PDF document text
    • https://roxuxafuz.weebly.com/uploads/1/3/0/8/130813852/2898826.pdfIn PDF document text
    • https://kanexunife.weebly.com/uploads/1/3/2/6/132681916/646038.pdfIn PDF document text
    • https://rirofogarerena.weebly.com/uploads/1/3/0/7/130775169/6c87205d36.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://fibonudonug.epizy.com/inverting_operational_amplifier_lab_report.pdfIn PDF document text
    • http://mafovito.rf.gd/declination_letter_attorney_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cdb4e41-273e-4b1a-8945-c24c8792037f/minn_kota_riptide_ulterra_80.pdfIn PDF document text
    • http://fuvenofagimugo.epizy.com/mebedujexetupepuwat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/796e5d13-fdaa-4c51-9c26-99dd59f005d9/rajorukalulawegoju.pdfIn PDF document text
    • http://xotepugiz.rf.gd/girl_scout_of_the_philippines_senior_uniform.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce675966-8b8a-4f51-a0dc-aab77ffaebc0/zovikevomigopinojelozu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3726965-ea2c-44e1-a881-c114499e8696/the_canterville_ghost_movie.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_off0000d511.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD511 5168 bytes
SHA-256: 5f8b707cad53ce455216f7aeb0fde9a13fe9135d8a41be57486075d40291cfaa
font_01_sfnt_off0000e6ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6AE 10480 bytes
SHA-256: 08f6a5f8dc43e3e3ad78c3f4bb52842fe5a9260bfadff2dbe81aa20d07b04ce2
font_02_sfnt_off00010a61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A61 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176