Malicious PDF — malware analysis report

Static analysis result for SHA-256 124ba35f227ab6b8…

MALICIOUS

PDF

78.3 KB Created: 2021-03-23 02:19:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 018cc9703e7a6032d1d18d8f4a8d37e2 SHA-1: 998a6c54dba3c681a5327dedfe4d2cfc94452f9d SHA-256: 124ba35f227ab6b89fe2ee711a8d2949d9c6e462b24d8bb1cc9cad0f81577c26
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 0.9992

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://baarspo.ru/aws?utm_term=over+the+rainbow+full+song+lyrics PDF link annotation
    • http://insitemonitoring.com/zorixofawuduvutexuzegwnf0.pdfIn PDF document text
    • https://gitakitopawal.weebly.com/uploads/1/3/5/3/135325500/nogivej.pdfIn PDF document text
    • https://cdn.sqhk.co/jawefujivi/yjdhdgc/how_to_turn_off_roaming_on_iphone_6s.pdfIn PDF document text
    • http://vknart.xyz/geometry_dash_free2jz32.pdfIn PDF document text
    • https://fuwowomazusora.weebly.com/uploads/1/3/4/0/134000162/5093183.pdfIn PDF document text
    • http://qrettalq.online/1308959727657sis.pdfIn PDF document text
    • https://kenibojowosude.weebly.com/uploads/1/3/5/3/135324683/votiketisokifone.pdfIn PDF document text
    • http://idealica-itufficiale.website/fceux_nes_emulator7wq9u.pdfIn PDF document text
    • http://tameenegypt.com/basic_english_grammar_for_class_2wdxjr.pdfIn PDF document text
    • http://tameeniraq.com/35918380918tbsyz.pdfIn PDF document text
    • https://cdn.sqhk.co/vepefilome/HElgihf/14616734920.pdfIn PDF document text
    • https://nuwukovodikala.weebly.com/uploads/1/3/4/6/134666266/ac3d0.pdfIn PDF document text
    • https://cdn.sqhk.co/tixukiko/iaghFJ8/55428942234.pdfIn PDF document text
    • https://cdn.sqhk.co/bogulevim/wsDy0ig/71617464699.pdfIn PDF document text
    • https://rerigexoz.weebly.com/uploads/1/3/4/5/134510817/taxas_texeke.pdfIn PDF document text
    • http://copyright-help-center.com/jackie_chan_rayo_reloj_de_pelcula_lmkieh.pdfIn PDF document text
    • https://baduzizexajozej.weebly.com/uploads/1/3/4/6/134653824/463349.pdfIn PDF document text
    • http://clientbluebadge.com/mdf_instruments_manual_blood_pressure_cuffy355b.pdfIn PDF document text
    • https://vulalubog.weebly.com/uploads/1/3/4/8/134862436/tomixewefofilofiw.pdfIn PDF document text
    • http://erkutungotu.com/945553106600hbqj.pdfIn PDF document text
    • https://matatotasewitux.weebly.com/uploads/1/3/1/3/131384286/8192113.pdfIn PDF document text
    • https://cdn.sqhk.co/suxupijisajo/hdKYfSL/barbie_movies_2018_in_english.pdfIn PDF document text
    • http://mebelrostov.ru/fawuzorixewebizath3eco.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/pirosisob/83609689740.pdfIn PDF document text
    • https://s3.amazonaws.com/fasomusogapovi/volvo_articulated_dump_truck_operator_manual.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_off0000f32e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF32E 5564 bytes
SHA-256: 319e9616326f7abd1073b050e84ca06a1f359c689ec4cad6b5c9f1fdfed4b1ad
font_01_sfnt_off00010635.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10635 11068 bytes
SHA-256: 1ea27f18d0aad4156a25d3dbf9c0546af492db191553131a24c7f88a0d841ed8

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