Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e4b0150e4b6f57d…

MALICIOUS

PDF

84.7 KB Created: 2021-04-01 00:08:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 19f2aa0a9f9718360b5f734667d930b5 SHA-1: b00b183e6fd9fda1b9b2c4f0fc18ea897ecbdfaa SHA-256: 9e4b0150e4b6f57d1ea9414024508a8917ace2549c9277fee72b22e1a18c4742
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. The document contains numerous embedded URLs, including one that appears to be a link farm designed to redirect users to potentially malicious content, specifically disguised as 'activity books for adults pdf'. The presence of multiple disposable hosting links further supports a malicious intent to obscure the true destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

Heuristics 5

  • 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 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://botokaw.ru/award?keyword=activity+books+for+adults+pdf PDF link annotation
    • http://instapriz.online/evie_launcher_apkpure_downloadogcbm.pdfIn PDF document text
    • http://lnstagramcopyrighthelps.com/dulilewemidixiyc4ej.pdfIn PDF document text
    • https://dunokosira.weebly.com/uploads/1/3/5/3/135349308/gibizanaruxuton.pdfIn PDF document text
    • http://sait-ok.ru/64702563326a7y5o.pdfIn PDF document text
    • http://chempion.coffee/iodine_sulfur_ionic_compoundzet9m.pdfIn PDF document text
    • http://tekufebuxu.iblogger.org/rosemount_3051s_datasheet.pdfIn PDF document text
    • https://luloludelipirad.weebly.com/uploads/1/3/5/3/135318650/jiruzutodu.pdfIn PDF document text
    • http://xviiivbgz.com/fisher_and_paykel_dishwasher_dd605_service_manualfhv15.pdfIn PDF document text
    • https://gimiduti.weebly.com/uploads/1/3/4/7/134711596/mixag_megeb.pdfIn PDF document text
    • https://bipufufutugudov.weebly.com/uploads/1/3/1/1/131164095/3101353.pdfIn PDF document text
    • http://igcopyrightforhelps.com/164524084262gf3c.pdfIn PDF document text
    • http://thedefenseforge.com/43152885755ktgl0.pdfIn PDF document text
    • http://bedating.online/fibotukikefiwupkmos.pdfIn PDF document text
    • http://minuette.me/difference_between_shareholders_and_stakeholderst6qma.pdfIn PDF document text
    • http://persequen.com/what_age_rating_is_terminator_dark_faterg4rg.pdfIn PDF document text
    • https://xuzubakew.weebly.com/uploads/1/3/0/9/130969304/49e68.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://s3.amazonaws.com/pisedij/10612704011.pdfIn PDF document text
    • https://s3.amazonaws.com/sosupejuxofedo/how_to_look_up_autopsy_report_az.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9dfa6163-1f70-4ea0-8efa-c180a0a2d138/mechanical_engineering_quality_control_jobs_in_chennai.pdfIn PDF document text
    • http://fojodopid.rf.gd/becoming_nigerian_elnathan_john.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f3ce2a5-cf3f-441b-bd30-9d93ebe58e13/18589425545.pdfIn PDF document text
    • https://s3.amazonaws.com/kezemiradigu/69070558564.pdfIn PDF document text
    • https://s3.amazonaws.com/mukut/16888563906.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d183c46e-b426-410c-999e-a1445699162b/nowat.pdfIn PDF document text
    • http://tuninedup.epizy.com/14732325849.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88ad124e-1512-4137-91fe-c35fbaaecc9a/303_squadron_battle_of_britain_pc_game.pdfIn PDF document text
    • https://s3.amazonaws.com/bipovoromoj/30543768081.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c714537-f975-458e-aba1-68fd4e9d9619/adobe_photoshop_learn_step_by_step.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_off0000ffbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFBB 5160 bytes
SHA-256: 4272cb73a82d91d78fe1b03623f914f3ebf350539977a5564537c45155814221
font_01_sfnt_off00011158.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11158 11028 bytes
SHA-256: a62936927727abebb72f788e88f5df31a601681185ef13832534d4a41e304cb4
font_02_sfnt_off0001371a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1371A 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71