Malicious PDF — malware analysis report

Static analysis result for SHA-256 492b35fe006b8cc7…

MALICIOUS

PDF

85.0 KB Created: 2021-02-24 19:43:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 5b51ff5cb00181815ec0246f43c05145 SHA-1: 052e57442efb4f3c4356baac417ca37f99daa6f5 SHA-256: 492b35fe006b8cc721f2cce6b8c2662020c1cbd67323473fa383d4565952a14d
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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://baarspo.ru/wb?keyword=basic%20computer%20course%20syllabus%20in%20hindi%20pdf%20download PDF link annotation
    • https://nutovavodus.weebly.com/uploads/1/3/4/0/134012609/rubagasexipejijojox.pdfIn PDF document text
    • http://segway-wheelchair.ru/compound_sentences_worksheets73tsn.pdfIn PDF document text
    • https://ledobosu.weebly.com/uploads/1/3/1/3/131383424/dewaw.pdfIn PDF document text
    • https://cdn.sqhk.co/lamiwifa/chbwbnk/goodreads_choice_awards_best_science_fiction.pdfIn PDF document text
    • http://nemosixumeki.mypressonline.com/parabody_350_workout_chart.pdfIn PDF document text
    • https://cdn.sqhk.co/ruperodu/aEjf4ie/shaolin_kung_fu_basic_training.pdfIn PDF document text
    • http://gakagebir.mypressonline.com/what_is_skin_so_soft_good_for.pdfIn PDF document text
    • http://vpntop.info/tubugf3559.pdfIn PDF document text
    • https://cdn.sqhk.co/navotezive/NjgnjfQ/gesifujavilowegijimat.pdfIn PDF document text
    • https://cdn.sqhk.co/visesefider/ijhiary/89836249761.pdfIn PDF document text
    • http://mangalvpodarok.ru/kenmore_progressive_canister_vacuum_filter_replacementlrtmu.pdfIn PDF document text
    • https://cdn.sqhk.co/faxixuwako/xdjhhcd/36779730104.pdfIn PDF document text
    • http://roduvogixaxo.66ghz.com/cateye_micro_wireless_manual_cc-_mc100w.pdfIn PDF document text
    • http://terugate.mypressonline.com/84262572430.pdfIn PDF document text
    • http://gifofebitatine.iblogger.org/kenwood_ddx9702s_reset.pdfIn PDF document text
    • https://kamapapidez.weebly.com/uploads/1/3/5/9/135962567/jizudosujazad.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://guradewididexep.epizy.com/bosch_300_dishwasher_manual.pdfIn PDF document text
    • http://durapufagumupo.rf.gd/how_to_add_parent_to_class_dojo.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_off00010990.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10990 5776 bytes
SHA-256: d8b50a3476a9e3131d7c6dab24db45b9eb12f30d43a410091868b53565768a77
font_01_sfnt_off00011d1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D1D 13384 bytes
SHA-256: 1a8ecc5cde00ae5e5ff5b6abc9005527c103383d04e2c871e241719877066786