Malicious PDF — malware analysis report

Static analysis result for SHA-256 75ba383d97b19fe7…

MALICIOUS

PDF

79.6 KB Created: 2021-04-22 22:49:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: bd2f55bd983caebde6e895a3a199b472 SHA-1: b39e05f734f24dc71c6e36f7d907be31c7c8aace SHA-256: 75ba383d97b19fe7e6aa8a3a08c719e51ebefa30f5a9144118ff1bd787b701ef
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 0.9997

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://mezovuduw.ru/strik?utm_term=volkswagen+tiguan+service+manual+pdf PDF link annotation
    • http://xusonawifofi.iblogger.org/how_to_get_rid_of_acne_scars_on_back_and_shoulders_home_remedies.pdfIn PDF document text
    • http://hs-life.ru/92679407840gf56q.pdfIn PDF document text
    • http://seamanygau.best/tinewigufukezibimonolekuen7.pdfIn PDF document text
    • http://wirelosine.22web.org/nugovowewedetaluwos.pdfIn PDF document text
    • http://lavokuladuranab.22web.org/93175751617.pdfIn PDF document text
    • http://power-guard.shop/the_elder_scrolls_legends_heroes_of_skyrim_gameplay2fu1q.pdfIn PDF document text
    • http://kernig.pro/40150017058tt28y.pdfIn PDF document text
    • http://item-get.top/52469428987qq6zn.pdfIn PDF document text
    • http://pipvip.ru/zagedepevosepafolodosamaxuyj3v.pdfIn PDF document text
    • http://sayfelengs.space/leaving_time_jodi_picoult_amazonp2rh1.pdfIn PDF document text
    • http://moscowflowers.shop/fire_and_ice_robert_frost_summaryqda33.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1f571a09-6495-4108-bd1a-9715deae29b5.filesusr.com/ugd/b0bf26_4708b44cccf6424eba7d3c37e174133d.pdf?index=trueIn PDF document text
    • http://ludakijawiku.rf.gd/jacdec_airline_safety_ranking_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/liwafo/painting_canvases_in_bulk.pdfIn PDF document text
    • http://mirepili.epizy.com/new_blob_content_type.pdfIn PDF document text
    • https://951e66c5-660f-4748-bfcc-a6cc0831133d.filesusr.com/ugd/4967bb_c58ee0cf59e145fca954f90b9f0fa948.pdf?index=trueIn PDF document text
    • http://redejepivu.rf.gd/le_botulisme.pdfIn PDF document text
    • https://s3.amazonaws.com/mogedozara/a_simple_forex_trading_system_that_works.pdfIn PDF document text
    • http://radirewuwubapet.epizy.com/31620093874.pdfIn PDF document text
    • https://s3.amazonaws.com/gajabedafot/pelpro_pp60_pellet_stove_parts.pdfIn PDF document text
    • http://tiwobera.rf.gd/30123059826.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_off0000f735.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF735 5656 bytes
SHA-256: a453e284a2fb504db5cff5f89f756516e33291768a51f4404e19ecbe093530a8
font_01_sfnt_off00010a7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A7F 11332 bytes
SHA-256: 1778433ac28d537874e81a42febf0a1b5dd6138084ada4d71acffac7c1f05091

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