Malicious PDF — malware analysis report

Static analysis result for SHA-256 5da235d209c51a3c…

MALICIOUS

PDF

91.0 KB Created: 2021-05-12 18:46:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: fcbade024da2295e9d8eef932db42d76 SHA-1: 2fef9aa24f2861aab617d74a8e1738f1d572e540 SHA-256: 5da235d209c51a3c53203571e7c644eb082e40c595f120771b213b4817b8b289
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of external URIs and the structure of the links, including UTM parameters, suggest an effort to redirect users to malicious content, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://jacksth.ru/strik?utm_term=honeywell+hyf290b+quietset+cooling+tower+fan PDF link annotation
    • http://particuliers-societegenerale.xyz/i_the_one_action_fighting_game_apkq8gb3.pdfIn PDF document text
    • http://rijupoxog.22web.org/77294179396.pdfIn PDF document text
    • https://cdn.sqhk.co/luwivimexu/djanCgj/rinavozukanafowuf.pdfIn PDF document text
    • http://zebakabum.iblogger.org/characters_in_maximum_ride_the_angel_experiment.pdfIn PDF document text
    • https://gavojaxuwutik.weebly.com/uploads/1/3/4/3/134319320/a3c3e8fc16017.pdfIn PDF document text
    • http://suxelutete.22web.org/wisukekapekuwixuworolawit.pdfIn PDF document text
    • http://gtomishebs.xyz/42196261901dffrh.pdfIn PDF document text
    • https://totijavefukaja.weebly.com/uploads/1/3/4/7/134705726/wimuni.pdfIn PDF document text
    • http://baxagaxisatipa.22web.org/journey_to_the_west_download_in_hindi.pdfIn PDF document text
    • https://sikezenubotimer.weebly.com/uploads/1/3/0/7/130739875/533633993b4.pdfIn PDF document text
    • https://cdn.sqhk.co/wobuwozavenu/iihihbz/dragons_world_online.pdfIn PDF document text
    • http://aydym.club/10020120343t4z50.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://zipazakixodi.rf.gd/59721068605.pdfIn PDF document text
    • http://pomedunud.epizy.com/48905659237.pdfIn PDF document text
    • http://fenubamijub.epizy.com/bumblebee_car_wallpaper.pdfIn PDF document text
    • https://s3.amazonaws.com/jarawaxanivu/lovebev.pdfIn PDF document text
    • https://s3.amazonaws.com/mikibetiv/weliwokokuwafupuvowal.pdfIn PDF document text
    • https://s3.amazonaws.com/jikopot/nationalism_in_india_class_10_textbook.pdfIn PDF document text
    • http://panadokopejed.epizy.com/marketing_questions_for_interview_and_answers.pdfIn PDF document text
    • http://kudopotawo.epizy.com/bakery_book.pdfIn PDF document text
    • https://s3.amazonaws.com/xazarujokemus/20226003894.pdfIn PDF document text
    • https://s3.amazonaws.com/tonisefoteka/first_things_first_song_imagine_dragons_lyrics.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_off000113b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113B6 5876 bytes
SHA-256: 7478d52b65a102c6487f1013c3ee7c92071868af11d00b35cbd2f148f6b42c85
font_01_sfnt_off000127bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127BC 11960 bytes
SHA-256: 54cba30141fdf6141ab5555451c0d38b1dd56455abeb7d5359a8be97c798ad8f
font_02_sfnt_off00014ff9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14FF9 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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