Malicious PDF — malware analysis report

Static analysis result for SHA-256 160c3972e52b003e…

MALICIOUS

PDF

78.4 KB Created: 2021-03-18 12:55:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 7039fa24d8e8b1bb580da2423d8603e1 SHA-1: 0e036e3398f5fbfa722dd45ca2812d13747814df SHA-256: 160c3972e52b003e836ba6205fb6528c4c3a7fd3fd0f421538fc4b7efc0ae3f3
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, indicating a link farm or redirection scheme. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded URIs point towards techniques used to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://resalured.ru/wix?keyword=dixmax+apk+pc PDF link annotation
    • http://zigogofarotago.22web.org/16161224881.pdfIn PDF document text
    • http://fumuponi.22web.org/zusofidoke.pdfIn PDF document text
    • http://xuroriwonufuz.scienceontheweb.net/what_is_error_code_12_on_a_bryant_furnace.pdfIn PDF document text
    • http://fetedeju.mygamesonline.org/zilasasanamawazuxi.pdfIn PDF document text
    • http://pupelowuvi.22web.org/dazemoxavekezapebimag.pdfIn PDF document text
    • http://vexeteseta.22web.org/pekavakewodoleronododun.pdfIn PDF document text
    • http://pafiwuz.66ghz.com/26668319688.pdfIn PDF document text
    • https://davabodijesofid.weebly.com/uploads/1/3/4/4/134474123/331fdba7ca.pdfIn PDF document text
    • https://tabugutiku.weebly.com/uploads/1/3/2/6/132682541/lekilazesukijopabud.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fekaduvopigab/clarinet_sheet_music_greensleeves.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/192c127e-ac38-42d6-8d23-1043a67a8ee4/honda_hs520_snowblower_price.pdfIn PDF document text
    • http://bukinajomo.epizy.com/havoc_demon_hunter_arena_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2da4c121-a0cd-43c3-b040-bc61fc3adebf/live_art_models_wanted.pdfIn PDF document text
    • http://gigosaz.epizy.com/pesajejerasomosebe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/930d843f-d0d9-4ef8-99a2-40e74ddeab64/american_red_cross_blood_drive_volunteer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9af5e4b5-076a-4c15-a27a-4a9853766657/how_to_buy_shares_market_indexes_are_there.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxagixil/is_trane_more_expensive_than_american_standard.pdfIn PDF document text
    • https://s3.amazonaws.com/lunojol/autocad_lt_2018_service_pack.pdfIn PDF document text
    • http://terudobikemep.rf.gd/akcent_kamelia_ringtone.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_off0000f3e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E3 4904 bytes
SHA-256: 060e3b7ebf00a4bcd6536c3f7e18cd37310d4845c9be6729421cea715f3ec241
font_01_sfnt_off00010492.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10492 12116 bytes
SHA-256: 818015feabafc445aa26f173bf729a82d23aa5801b9347d633d8ac3c189d2866

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