Malicious PDF — malware analysis report

Static analysis result for SHA-256 bed702d59f234bef…

MALICIOUS

PDF

97.8 KB Created: 2021-06-29 11:12:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d8028f2f7c8355d6bdd0a0df6f4bfcbf SHA-1: a08d3b8f3689dc5d8df5ea92f52b2096d3c06f80 SHA-256: bed702d59f234befcc3d00c8aa28bb3647cc9ac1d670178a0d383913e85c2eeb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised websites, suggesting an attempt to distribute malicious files. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a common phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9895

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 http://xlsferrosilicon.com/d/files/39050707732.pdf
    • https://farmacieitaliane.com/documenti/file/3026216583.pdf
    • https://michelbarbot.com/upload/files/27459156284.pdf
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/oeqrejq8d3iv42h78tu5necnm6/56366006794.pdf
    • http://copelandreunionla.com/clients/6/66/66f6f3de7053633686652f51c4c00696/File/xovijiredararunof.pdf
    • https://alice-immo.com/userfiles/file/nogubutagiwutumudiluripot.pdf
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/160a4e027d6a50---63123071397.pdf
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084a347a539f---62613044338.pdf
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b03ead3a15c---4573302861.pdf
    • http://hitecds.com/userfiles/file/kodalubovixoxujefikem.pdf
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/30be474d1008840a85952b196c340139/jumeratozulafetusefenafi.pdf
    • https://airbays.com/userfiles/file/wuvumaxabub.pdf
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/kqgih6l0lc7pg1orl7ntm146n7/xosepigezugolavo.pdf
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/867408d3229ca45e35d509c9fc48e93e/bejugukewizimumufarujode.pdf
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607ea3f077512---duvojezudosalogu.pdf
    • http://randalljroutson.com/clients/44711/File/mofijozeguxoz.pdf
    • https://tlpnw.com/wp-content/plugins/super-forms/uploads/php/files/74d53ab77fc27fb662c85f1b0725c8d8/72065246297.pdf
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bf2aae01d7---8327722310.pdf
    • http://fogathajtohirek.hu/fckfiles/file/gutagefapavapirisexu.pdf
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078aeb5c7fc9---fudabolaluzo.pdf
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/0b42cd927506819f5099fc0288d74637/26141044656.pdf
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d268685e9c---pugumonoturubekuv.pdf
    • https://angelsstaff.com/uploads/file/lasofowevizomeki.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=is+there+anybody+out+there+ielts+answers
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa97.bin
ddcce2b7ef813ca8b3dd223a5d8e62e97f90327bccf4631c9ca897e1015bfdf4
pdf-font-stream PDF embedded font (sfnt) at offset 0xFA97 30012 bytes
font_01_sfnt_off00013624.bin
2404eaee68dcc7d5228cefb63b89a59e895cc7ea35f62181e9d1bd290e0f76df
pdf-font-stream PDF embedded font (sfnt) at offset 0x13624 4508 bytes
font_02_sfnt_off000146e2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x146E2 16792 bytes
font_03_sfnt_off00015ef9.bin
7e7ba2e8d6696c465df63805940835171ab4d1636f3e1809c1b66fdc0b6dcb3a
pdf-font-stream PDF embedded font (sfnt) at offset 0x15EF9 10736 bytes