Malicious PDF — malware analysis report

Static analysis result for SHA-256 194e3967fd08a4bb…

MALICIOUS

PDF

78.4 KB Created: 2021-03-10 03:46:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 5f8eff07abf697b27c8c51d954ad7984 SHA-1: 07f0d2f03a5f9ad26bf52a4c792ff8b1086b942d SHA-256: 194e3967fd08a4bbcb33d3ef99a29c7f11973ee2f1c13271a02088d07d218df5
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous URLs point towards a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

Heuristics 6

  • 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 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://jottigo.ru/strik?utm_term=origami+pocket+book+instructions PDF link annotation
    • http://zefujixa.mywebcommunity.org/out_of_sight_out_of_time_ally_carter.pdfIn PDF document text
    • https://cdn.sqhk.co/raxoxawupej/f9jdijb/ps4_emulator_apk_ios_download.pdfIn PDF document text
    • https://cdn.sqhk.co/naludibeg/qheVh45/niwowokefugi.pdfIn PDF document text
    • http://nadipewin.mywebcommunity.org/scarlett_18i8_2nd_gen_vs_3rd_gen.pdfIn PDF document text
    • https://tewafegode.weebly.com/uploads/1/3/5/3/135350941/6787770.pdfIn PDF document text
    • https://gosasolana.weebly.com/uploads/1/3/4/5/134523876/zevumagirofuzo-jenuzegegitu-migux.pdfIn PDF document text
    • https://cdn.sqhk.co/jevamivuvugi/ji7ifgh/design_my_home_makeover_level_101.pdfIn PDF document text
    • https://cdn.sqhk.co/debefuki/EGZhcsk/new_horizons_credit_union_atm_locations.pdfIn PDF document text
    • https://gejosubirimo.weebly.com/uploads/1/3/0/7/130776575/xuwafu_zuvimum_nozelosi.pdfIn PDF document text
    • http://tigibisolefora.mygamesonline.org/zalurowuz.pdfIn PDF document text
    • https://keziputaxa.weebly.com/uploads/1/3/2/7/132711938/ad96021b.pdfIn PDF document text
    • https://rifijilaguselud.weebly.com/uploads/1/3/4/8/134846829/godubosifasa.pdfIn PDF document text
    • https://cdn.sqhk.co/reretukida/wjjhjZX/wyrmprint_guide_dragalia_lost.pdfIn PDF document text
    • http://tomolijoponix.mypressonline.com/how_do_you_redeem_pokemon_code_cards.pdfIn PDF document text
    • https://fonevufaj.weebly.com/uploads/1/3/4/4/134444269/5077725.pdfIn PDF document text
    • https://xewixubigikuj.weebly.com/uploads/1/3/4/8/134892453/e60599f5cb5fe.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://zovitox.epizy.com/broadsheet_vs_tabloid_language.pdfIn PDF document text
    • https://79d86aa2-23c4-4aa0-a0dc-c16ac59ae55d.filesusr.com/ugd/ecb701_51ecd67f5e274ea199cb506289bc218f.pdf?index=trueIn PDF document text
    • http://tefokubekaxo.rf.gd/how_to_open_ariston_washing_machine_door.pdfIn PDF document text
    • https://551f0ad2-75d1-4009-b90b-2f3e3e20230b.filesusr.com/ugd/c2bf0a_554a6e0bae544826adfa6a2f2aa26413.pdf?index=trueIn PDF document text
    • http://venakato.epizy.com/julofojafusofeneviji.pdfIn PDF document text
    • https://6e229dea-1f83-4be8-8cd3-388eabd4f5e3.filesusr.com/ugd/1cfe37_714bed2ba5314de9a62fbdf84170e153.pdf?index=trueIn PDF document text
    • https://709e7e89-b264-4d73-b757-064736ed86f1.filesusr.com/ugd/f523c3_9209dfa47e5e4118a5aa9998a3fb9156.pdf?index=trueIn PDF document text
    • http://tupapepebaraj.rf.gd/mugevijubofubokumex.pdfIn PDF document text
    • https://ad858f6a-7bbb-416d-9365-e04d7986ed9b.filesusr.com/ugd/3c9ac1_7801b26df1974bfba379c2fddb51222f.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF4B 5336 bytes
SHA-256: 976ec492b63ba0cfaa7f34bc007cc6f256147c47d07888e79a1f2779d9fcbd8c
font_01_sfnt_off0000f14f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF14F 1800 bytes
SHA-256: e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d
font_02_sfnt_off0000f9dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9DD 10672 bytes
SHA-256: 99f58fbc29d94566bd28d59ab5548d53ed78f54b48e9ce6aed80d4853092f930
font_03_sfnt_off00011da9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DA9 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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