Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ad6ddfee572d520…

MALICIOUS

PDF

80.1 KB Created: 2021-03-31 22:07:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 1c3401173833139f3e227476ba967583 SHA-1: b1bb45954a9912bb7bbd76db1fdb65efcb4fbf90 SHA-256: 1ad6ddfee572d520c8cb147f56bede5f65d195c685f212fe9e93ec9497d82693
166 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious intent, including suspicious and invisible links pointing to potentially malicious domains. The ML classifier and ClamAV detection strongly suggest this is a phishing or malware delivery document. The embedded URLs, such as http://loginwithfb.site/veluvidetokunowic96kk.pdf, are likely used to host malicious content or redirect users to phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://dugedepap.ru/strik?utm_term=reading+line+graphs+worksheets+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4394060/normal_604620dc1a8f6.pdfIn PDF document text
    • https://cdn.sqhk.co/besogevipadi/cihjc9h/kisefaror.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446147/normal_5fc906dc0ce60.pdfIn PDF document text
    • http://italywow.space/fishing_report_keaton_beach_florida6zuk1.pdfIn PDF document text
    • http://santaparker.store/honda_civic_secret_menu355e8.pdfIn PDF document text
    • http://nujagexurej.medianewsonline.com/rigiruroxi.pdfIn PDF document text
    • http://loginwithfb.site/veluvidetokunowic96kk.pdfIn PDF document text
    • https://cdn.sqhk.co/pumefafenul/jehezhd/62949081541.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403534/normal_5ff5759a8487f.pdfIn PDF document text
    • http://lnstagramcopyrightcenter.com/highway_rider_old_version5iqep.pdfIn PDF document text
    • https://cdn.sqhk.co/nobipajami/Pdohigi/tower_defense_simulator_roblox_codes.pdfIn PDF document text
    • https://cdn.sqhk.co/rotefuver/jbjfXie/paycell_sanal_kart_limiti.pdfIn PDF document text
    • http://antileqphh.site/ziwugilupaniftvbcs.pdfIn PDF document text
    • https://cdn.sqhk.co/rawatajizefu/dhbhheD/sago_mini_town_mod_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448347/normal_6012b1d129c61.pdfIn PDF document text
    • http://fonixeguga.mywebcommunity.org/jiwunujoranexunigina.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417226/normal_60103c2ecb863.pdfIn PDF document text
    • http://jisutuxoxaza.medianewsonline.com/rovenemixuw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://wugujub.onlinewebshop.net/89990829099.pdfIn PDF document text
    • https://s3.amazonaws.com/bupesejirijejus/wamagivu.pdfIn PDF document text
    • https://45f91bdd-2b68-4e60-ae2c-b14373ae5332.filesusr.com/ugd/0d089b_d4253edf10814956bf68195e52c3e96c.pdf?index=trueIn PDF document text
    • http://pusapovewazigu.onlinewebshop.net/batapuxaxukobis.pdfIn PDF document text
    • https://33b7cf8b-1cb2-46d9-9063-17e97cba5e80.filesusr.com/ugd/9edd50_f325702fc613461b828cbb771ae4c9f2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bubeto/microbial_ecology_lecture_notes.pdfIn PDF document text
    • https://b73b9701-b1df-43be-b031-73419f87697c.filesusr.com/ugd/bfbd96_7ef0e0a743a94db79d972a75b05e6b6f.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF53 5252 bytes
SHA-256: 7128af16a0e6b963864d2cd40289acc35b147da4435d39f73c5090f3fea6c9d5
font_01_sfnt_off00010132.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10132 10324 bytes
SHA-256: 62a0b0cab1e2d8ef3bed4e3a639646d47629012e36b1461402609b1d81eab963
font_02_sfnt_off00012486.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12486 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378