Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a01accef131a416…

MALICIOUS

PDF

79.5 KB Created: 2021-03-29 16:54:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 20c3d674cb286c3b88d2833d3cc8d578 SHA-1: 5d066a808476cb4c1b73b81eed4a4bec9b529486 SHA-256: 1a01accef131a416db322f19456f349b89b4817c2b9f5162bd3cb58bc7a45a73
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable hosting, suggesting a link farm designed to redirect users. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the presence of many unknown reputation URLs strongly indicate a malicious intent to drive traffic to potentially harmful sites. ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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 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://kuzutuzo.ru/wix?keyword=nuwave+oven+manual+pdf PDF link annotation
    • https://sukanogijero.weebly.com/uploads/1/3/4/3/134333185/taler_vidarofaganama_sufoxokanegas.pdfIn PDF document text
    • http://pasetbs.xyz/hampton_bay_remote_control_app8ru2b.pdfIn PDF document text
    • https://cdn.sqhk.co/jeporikate/jeGNghR/anjaan_race_wars_mod_apk.pdfIn PDF document text
    • https://jufozawuvinuxak.weebly.com/uploads/1/3/5/3/135326647/3769332.pdfIn PDF document text
    • http://pro-gram.pro/sobevaxutakapirofutyfmm1.pdfIn PDF document text
    • http://trickyturkey.com/bankers_adda_english_vocabularyrhp0t.pdfIn PDF document text
    • http://my-favshope.online/wanott9mzn.pdfIn PDF document text
    • https://bawenijujobafo.weebly.com/uploads/1/3/4/6/134670929/a1fb06.pdfIn PDF document text
    • https://cdn.sqhk.co/zapiseniw/hbgZjjI/bupesote.pdfIn PDF document text
    • http://cmb-accueil.com/111975615465d0jr.pdfIn PDF document text
    • https://cdn.sqhk.co/kepebeso/Yj7hhjh/pupudanesupozewuzuxalim.pdfIn PDF document text
    • https://cdn.sqhk.co/fisejadiruw/hFNBijt/48291629676.pdfIn PDF document text
    • http://ladidoxa.iblogger.org/xawedabotije.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
    • https://uploads.strikinglycdn.com/files/5ac40cb7-af50-4832-a220-043a0c199992/texipabut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/164d1e1a-9e58-4170-80ea-70bb67b402cc/lixewat.pdfIn PDF document text
    • http://fexijedapafob.epizy.com/bewupajofodujelosuni.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f1fbde1-972d-4c35-a280-8d9eb6a9a523/tipozujoriraxazotomutoki.pdfIn PDF document text
    • https://s3.amazonaws.com/jolunenafobuw/eddie_the_eagle_parents_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/dikobepibelun/romeo_and_juliet_act_1_scene_1_themes.pdfIn PDF document text
    • https://s3.amazonaws.com/wefemabeni/audio_technica_at-_lp60bk_manual.pdfIn PDF document text
    • http://safatezep.epizy.com/traducteur_fichier_allemand_francais.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b31f08cf-8e86-49c5-b318-1a0c9106bda6/23719072791.pdfIn PDF document text
    • http://pepiretivixu.epizy.com/46656212996.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC97 4788 bytes
SHA-256: ae1c0c522c297eca8f88c07749779b59280788cb1ae22229640ac15f8ec6ced9
font_01_sfnt_off0000fce3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCE3 10996 bytes
SHA-256: c4b51515726efcdadc2c985ae250a70216a99a3876954f7270a321ba8aa59ec2
font_02_sfnt_off00012280.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12280 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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