Malicious PDF — malware analysis report

Static analysis result for SHA-256 fed3741d4a7dfa1b…

MALICIOUS

PDF

72.3 KB Created: 2021-02-25 05:41:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 643a1e26caaa4a95915bd034da8b959a SHA-1: 1603aeade954dab3b5985ea6084e2f104e2f1bcb SHA-256: fed3741d4a7dfa1be78067266534c2fca8a2656e66e1cf1814d99c6329738ccc
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://druttle.ru/123?utm_term=polaroid+is2132+16mp PDF link annotation
    • http://alexsaf.ru/afro-_cuban_rhythms_for_drumseto0ugh.pdfIn PDF document text
    • https://pufenenuboz.weebly.com/uploads/1/3/0/7/130738511/sozik.pdfIn PDF document text
    • https://cdn.sqhk.co/pajijolabalu/EG8hbih/ninja_cool_games_online_unblocked.pdfIn PDF document text
    • https://lopatitegadusi.weebly.com/uploads/1/3/5/3/135311006/rosojoli-tivajedat-ruvipabefobinoz-xomenopoza.pdfIn PDF document text
    • https://xavaruren.weebly.com/uploads/1/3/1/3/131383751/515822.pdfIn PDF document text
    • https://cdn.sqhk.co/zovifesojeme/rjhihY4/jezojetimogololi.pdfIn PDF document text
    • https://rimemukevip.weebly.com/uploads/1/3/4/3/134318995/kajadunu.pdfIn PDF document text
    • https://mabamigetope.weebly.com/uploads/1/3/4/4/134493328/4a509.pdfIn PDF document text
    • http://astropsychology.website/what_does_a_confidence_fitness_machine_do4lxgb.pdfIn PDF document text
    • https://cdn.sqhk.co/tukawezezo/hFiiigu/litobujonowev.pdfIn PDF document text
    • http://vugiris.22web.org/android_9_dark_mode_honor_8x.pdfIn PDF document text
    • https://cdn.sqhk.co/vaxarogajib/4ifaXhe/26713614207.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sefijepevuzazax.rf.gd/vufowa.pdfIn PDF document text
    • http://zutagokakaki.rf.gd/imagine_dragons_demons_lyrics.pdfIn PDF document text
    • http://toxanezijar.rf.gd/power_book_2_season_1_episode_10_release_date.pdfIn PDF document text
    • http://dekifovep.epizy.com/carbatec_10_table_saw_manual.pdfIn PDF document text
    • http://relogevavikidid.epizy.com/android_uncaught_referenceerror_is_not_defined.pdfIn PDF document text
    • http://boraxijud.epizy.com/appointment_letter_template_singapore.pdfIn PDF document text
    • http://wonetone.rf.gd/pkp_bielsko_biaa_informacja_telefoniczna.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dab7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAB7 5608 bytes
SHA-256: 570939c969bfb4c9420fb968b13db217f87398f8266f29ad4835d84578fe562f
font_01_sfnt_off0000edaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDAF 10856 bytes
SHA-256: faf308c2a1e6f283f66ae7b18e7b7a669887f9d38f6559eb7fe1e19f15a66f80

Open this report in the interactive analyzer, or submit your own file for analysis.