Malicious PDF — malware analysis report

Static analysis result for SHA-256 9508904de926a17f…

MALICIOUS

PDF

83.7 KB Created: 2021-04-27 07:29:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 13c2d6cc2470d593cb535e53fe451f75 SHA-1: 96cba595704ac251c809b0b74123dd49a314649e SHA-256: 9508904de926a17fcf6c98f61701503d2f0c00b2c6e1167e8a46c348f8ebff36
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 0.9993

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://bologen.ru/strik?utm_term=samsung+xpress+c460w+wifi+setup+mac PDF link annotation
    • https://gavaxavudo.weebly.com/uploads/1/3/4/5/134581950/jibebu.pdfIn PDF document text
    • https://menufaron.weebly.com/uploads/1/3/0/7/130775522/wetaxowovawe-biperi-bivitapototaken-bopilol.pdfIn PDF document text
    • https://keveronusixenub.weebly.com/uploads/1/3/4/8/134852782/1997353.pdfIn PDF document text
    • https://sowovejapa.weebly.com/uploads/1/3/4/7/134709895/gotadidilitogu_nudexumizon_jisuzogaduxa.pdfIn PDF document text
    • https://metidelesaweso.weebly.com/uploads/1/3/0/8/130813592/nabewipirolomo.pdfIn PDF document text
    • https://cdn.sqhk.co/gisatajofo/vghjQjf/xitodivexarudova.pdfIn PDF document text
    • https://laxuwipulave.weebly.com/uploads/1/3/5/9/135956831/4644068.pdfIn PDF document text
    • https://dadekojulaza.weebly.com/uploads/1/3/4/3/134320805/fufanorusefuto.pdfIn PDF document text
    • https://puwegamojone.weebly.com/uploads/1/3/4/7/134702565/kelup-fefiwovuvopitar-sebuguvuputula-fasefu.pdfIn PDF document text
    • https://pizipeko.weebly.com/uploads/1/3/4/6/134611096/9930865.pdfIn PDF document text
    • https://toxoladosa.weebly.com/uploads/1/3/4/4/134479392/0651a3.pdfIn PDF document text
    • http://ruluzuzadol.mypressonline.com/manuale_dell_apicoltore.pdfIn PDF document text
    • https://wovodolu.weebly.com/uploads/1/3/4/8/134861979/56d7b881.pdfIn PDF document text
    • https://cdn.sqhk.co/lokiwejawe/y0zjcNQ/wolf_girl_and_black_prince_episode_13_vostfr.pdfIn PDF document text
    • http://duzixofiwisegi.mygamesonline.org/jetexatu.pdfIn PDF document text
    • https://cdn.sqhk.co/vomikigiw/QCYZgec/football_2020_standings.pdfIn PDF document text
    • https://cdn.sqhk.co/gufojakig/ligeijc/snake_game_2._0.pdfIn PDF document text
    • https://vesodebeso.weebly.com/uploads/1/3/4/3/134314426/lupikodiz.pdfIn PDF document text
    • https://mepanomelisegil.weebly.com/uploads/1/3/4/8/134899905/zomuvutaroregif-vojurilinaxivox-takuxi-talamapiravu.pdfIn PDF document text
    • https://wasutemup.weebly.com/uploads/1/3/4/6/134651280/3491349.pdfIn PDF document text
    • http://jepewadagamer.scienceontheweb.net/zikadaridanazoxut.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/makixibawumebol/aasimar_5e_volo_s_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/pajeriramal/13658630792.pdfIn PDF document text
    • https://s3.amazonaws.com/xirixepo/pejizevokazuv.pdfIn PDF document text
    • https://s3.amazonaws.com/goveruduzewoxu/sansa_mp3_player_battery_replacement.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_off0001036d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1036D 5948 bytes
SHA-256: df553a512b930f0caaacb1df28ec53325ae4c5bee0b254b0f8cd5380d4ed1b15
font_01_sfnt_off000117b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117B8 14228 bytes
SHA-256: df932fcbfbe551acf3ccdf387c9752994fea1a3b0730afc9cf8880f45d3c1b0e