Malicious PDF — malware analysis report

Static analysis result for SHA-256 d058823d1ee4cc36…

MALICIOUS

PDF

87.4 KB Created: 2021-03-28 20:31:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 0bc2989b3f72e3eb8e5b16dd5e76f648 SHA-1: 7671b54f523bf4d8bb5029706beed5c748f82668 SHA-256: d058823d1ee4cc368ed8445b28f65dd393c2de828cbf739e5a5f24d7d1ee2a21
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 0.9996

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://botokaw.ru/wix?keyword=nissan+xterra+manual+transmission PDF link annotation
    • https://xowanejizaki.weebly.com/uploads/1/3/1/8/131871556/piwilusin.pdfIn PDF document text
    • http://afracheat5.xyz/logitech_harmony_700_rechargeable_batteriesjee1q.pdfIn PDF document text
    • http://cmb-accueil.com/bahubali_2_video_songs_telugu_freep9jio.pdfIn PDF document text
    • http://3-bureaureport.info/57528919404pvprg.pdfIn PDF document text
    • https://bamutemo.weebly.com/uploads/1/3/2/6/132681362/nesigiv.pdfIn PDF document text
    • http://smartcoin.design/equifax_credit_report_address_and_phone_numbervqqo3.pdfIn PDF document text
    • http://es50off.pro/mewuso2wlml.pdfIn PDF document text
    • http://idealicaitaly-ufficiale.site/acoustic_phonetics_stevensaur0b.pdfIn PDF document text
    • https://damajarulapo.weebly.com/uploads/1/3/0/7/130738748/sovabe-doxifuji.pdfIn PDF document text
    • https://famosufed.weebly.com/uploads/1/3/4/9/134900490/3544690.pdfIn PDF document text
    • http://detonicufficiale.website/transparent_screen_appamef7.pdfIn PDF document text
    • http://leon-stavki.info/rikugekqxdfg.pdfIn PDF document text
    • http://masito.space/what_are_the_6_types_of_hazards_in_the_office2cby9.pdfIn PDF document text
    • http://cz-nitrof.website/princess_makeup_games_freexi13z.pdfIn PDF document text
    • https://xigeworimejol.weebly.com/uploads/1/3/1/4/131483719/sinaluxa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wometopususap.rf.gd/41283830790.pdfIn PDF document text
    • http://mavuginogafesu.epizy.com/tutupaxuroxetidufixi.pdfIn PDF document text
    • http://xoginufosu.epizy.com/98069293056.pdfIn PDF document text
    • https://s3.amazonaws.com/mamukawaxatali/life_cycle_of_ascomycetes.pdfIn PDF document text
    • https://s3.amazonaws.com/bifamomove/43238465394.pdfIn PDF document text
    • https://s3.amazonaws.com/remeranexe/sonyach_bashing_marathi_song.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010400.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10400 4868 bytes
SHA-256: 399ce504150ebb7fcb54b7307ab2277f4c82a3fca0d78f7d34a9325d329d6a35
font_01_sfnt_off0001147c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1147C 11504 bytes
SHA-256: 0c33352c0720eed9b662a98a10f016eaf04fc6a1a63076a5c91d755174e0ca4a
font_02_sfnt_off00013b33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B33 16060 bytes
SHA-256: 713933360072c9d59346590fad668f98c3603c6d2b72ed941ce85481f6af0b74

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