Malicious PDF — malware analysis report

Static analysis result for SHA-256 60a3d3afc270a07a…

MALICIOUS

PDF

73.5 KB Created: 2021-02-23 22:17:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 740a14ce8b4e7ef9ca45d42e5cb49583 SHA-1: b311aa7bb4caffb113f960df14a129209762f4e0 SHA-256: 60a3d3afc270a07ac7681a37a6ef0ae5355da90ba6be5c6a43199fabffc3f1b8
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/strik?utm_term=lacrosse+atomic+clock+instructions PDF link annotation
    • https://cdn.sqhk.co/vagizabibo/EBgh0hh/68684916904.pdfIn PDF document text
    • http://onlinetyz.xyz/the_hungry_tide_by_amitav_ghosh2ccwz.pdfIn PDF document text
    • https://cdn.sqhk.co/jadidawa/JifVgjW/kefobogaluzitamanow.pdfIn PDF document text
    • https://cdn.sqhk.co/wadusazilox/jaRqpjb/lojetobujisufemegeke.pdfIn PDF document text
    • https://cdn.sqhk.co/lonuxonemor/Cijhbb9/airplanes_world_war_ii.pdfIn PDF document text
    • https://cdn.sqhk.co/xavaxonad/96hjggg/50207817417.pdfIn PDF document text
    • http://nikecortez.net/abbe_refractometer_working_principlekbjc8.pdfIn PDF document text
    • https://cdn.sqhk.co/nakijalufiw/oowigig/98381332805.pdfIn PDF document text
    • https://cdn.sqhk.co/kimefutif/hjhdASV/football_champions_league_table.pdfIn PDF document text
    • http://merishwheelrecords.com/tesavatupafadujegod24uz3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://juvumutat.rf.gd/apple_ipod_touch_4th_generation_8gb_price_in_india.pdfIn PDF document text
    • http://lolofekigosot.epizy.com/jejiposawajupefazaxozit.pdfIn PDF document text
    • https://s3.amazonaws.com/gozifep/france_food_guidelines.pdfIn PDF document text
    • http://xogimutidum.epizy.com/fewawurelekaje.pdfIn PDF document text
    • http://fojagezo.rf.gd/fazutolasefewiwunujatuni.pdfIn PDF document text
    • http://lunujebof.rf.gd/10909720887.pdfIn PDF document text
    • https://s3.amazonaws.com/tanapilamaxi/vegujapawodiruki.pdfIn PDF document text
    • https://s3.amazonaws.com/wipotegadodorek/47088909290.pdfIn PDF document text
    • http://sesilav.rf.gd/waxezozilaviridekukutuvuk.pdfIn PDF document text
    • http://zumijuxuv.epizy.com/berg_balance_scale.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_off0000e2d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2D7 4948 bytes
SHA-256: 6674bbb833172c644a9c74a74bf283419a5fe70feebf8636aa6b0005fd18cdd5
font_01_sfnt_off0000f399.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF399 10976 bytes
SHA-256: eb17a6d111c26e6d4ab68b01a7e16775eae565237105b969b164cb78ef24f20a