Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bba246448302457…

MALICIOUS

PDF

80.2 KB Created: 2021-04-05 12:51:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 2b64fe986619cc271d08ca60f6ad3e4b SHA-1: df4d585ebcc8eac0e98041b47a34370f9224ec1c SHA-256: 7bba2464483024572818c8509c6fcb8bf2df14e266b3c30bbb1c253f91ae2326
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous external URIs and is flagged as a link farm on disposable hosting, indicating a malicious intent to redirect users. ClamAV and ML classifiers confirm its malicious nature, classifying it as a phishing trojan. The presence of multiple external URLs suggests a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://jacksth.ru/123?utm_term=port+aransas+deep+sea+fishing+guides PDF link annotation
    • http://vuvufese.22web.org/free_creative_writing_worksheets_for_grade_4.pdfIn PDF document text
    • http://geekcods.com/bavawl2zck.pdfIn PDF document text
    • http://babblescoop.store/what_is_rice_to_water_ratio_in_rice_cookerw1wsi.pdfIn PDF document text
    • https://cdn.sqhk.co/kukisigafumi/dgeewjb/easy_loader_trailer_fenders.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366961/normal_6014967d0dc73.pdfIn PDF document text
    • http://xixapewazawa.22web.org/wuxuvapewebekezofej.pdfIn PDF document text
    • https://cdn.sqhk.co/pibusupi/mhj9hc7/unblocked_games_uphill_rush_5.pdfIn PDF document text
    • http://autobaff.xyz/lenigawarovejugibx7dz6.pdfIn PDF document text
    • http://nojitowe.iblogger.org/administracion_financiera_1.pdfIn PDF document text
    • https://cdn.sqhk.co/limizolaxa/Biajdhg/dutch_throwdown_buddy_edition.pdfIn PDF document text
    • https://cdn.sqhk.co/dafibuxoki/hjVhbja/ios_music_player_no_ads_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412380/normal_6031584f61f78.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481515/normal_5fd884c7a7835.pdfIn PDF document text
    • http://filebitikuj.iblogger.org/46733981989.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492600/normal_604de91f3a54b.pdfIn PDF document text
    • http://kosolibanun.iblogger.org/tratados_de_libre_comercio_de_mexico_con_el_mundo.pdfIn PDF document text
    • http://topvideo.design/vikukipupadebokinatafoega94.pdfIn PDF document text
    • https://cdn.sqhk.co/kuretunaba/Qjaibiy/rapid_racer_bearing_kit_11.pdfIn PDF document text
    • http://helpcontactform.com/247855359431si73.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pasofotamuteper.atwebpages.com/37521888245.pdfIn PDF document text
    • http://desovizipelo.onlinewebshop.net/accounting_theory_7th_edition_jayne_godfrey.pdfIn PDF document text
    • http://fubavinexazixo.onlinewebshop.net/54460680858.pdfIn PDF document text
    • http://lasikisitikuve.epizy.com/poridukajupuribilew.pdfIn PDF document text
    • http://zuvujivir.rf.gd/97361381068.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000faee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAEE 5272 bytes
SHA-256: 9feb4aab9e41226f93acf228211e34498451f5dcaeaac910e8968a82ad5284f2
font_01_sfnt_off00010cda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CDA 11296 bytes
SHA-256: ab90f5d75c7cb3d7b57776f1860a7d54e0061e866237b95d1970c7ec563733ca

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