Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a2cace14f2f3595…

MALICIOUS

PDF

82.0 KB Created: 2021-09-18 19:55:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 32021b4e7c7b31091e6fe6319795b02e SHA-1: ed16d0c06db8d3690ffdc6ed3bbca2c6d5c51e30 SHA-256: 5a2cace14f2f3595777e2c3f261cc0494ec207f607a401304a159deaed2677f7
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised websites and disposable domains, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. The file's structure as a link farm suggests it's designed to lure users to external, potentially harmful, content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://covina.crazyrockinsushi.com/uploads/files/peziborovuxe.pdf In PDF document text
    • http://autosvilar.com/uploads/ckfinder/files/92625767545.pdfIn PDF document text
    • http://defhjdrjioo.friend-match.com/upload/files/litubitidir.pdfIn PDF document text
    • http://gallery4walls.com/upload/editer/file/loxija.pdfIn PDF document text
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/4475d233b394767ad52e95b435b2f90f/sobasidegixo.pdfIn PDF document text
    • http://markone-tools.com/upload/files/futekivomewulameb.pdfIn PDF document text
    • http://smolensk-bakaleya.ru/userfiles/file/71662339883.pdfIn PDF document text
    • https://braveathlete.net/geektic/files/ratasagepofuxa.pdfIn PDF document text
    • http://chromowane.com/userfiles/file/wajeb.pdfIn PDF document text
    • http://toptoptraining.ru/img/upload/file/weruvotexuzedemosusekaf.pdfIn PDF document text
    • http://friulanapanini.com/images/file/nigenikobijoje.pdfIn PDF document text
    • https://hankilfood.com/upfile/files/24852290175.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161433858ce887---49095594780.pdfIn PDF document text
    • https://uclerbaklava.com/resources/file/bipeti.pdfIn PDF document text
    • http://wingtsunkungfu.ro/imagini_ws/wugivelitip.pdfIn PDF document text
    • https://tattica.byespresso.com/app/webroot/files/upload/files/fevamitajudukudujoj.pdfIn PDF document text
    • http://rhondadejean.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/pufitoxatani.pdfIn PDF document text
    • https://immo-cjeanpaul.lu/userfiles/files/95571269688.pdfIn PDF document text
    • http://dpsnowodworze.pl/userfiles/file/kujamavafamo.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613af32ea991d---10682823626.pdfIn PDF document text
    • http://dailitara.lt/bites/uploads/file/panamofurerozurevebe.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f0152a4a7c---wivuzovokimiponuwudiroke.pdfIn PDF document text
    • https://big-affaires.com/img/pics/files/42580564208.pdfIn PDF document text
    • http://aasghsflqsae.handylover.com/upload/files/kiwomomugijakenufub.pdfIn PDF document text
    • https://idea-web.ro/app/webroot/files/userfiles/files/sapukorezunozozumesabozok.pdfIn PDF document text
    • http://clubmaniacr.com/campannas/file/57796788176.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=realme+7+pro+ui2+0+updatePDF link annotation
    • 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://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_off0000dba0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBA0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f3b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3B2 17704 bytes
SHA-256: e1e4dc3852cecfd3749007dd7752df0a55e6d16f8533222726345dd8567b493f
font_02_sfnt_off000121de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121DE 10716 bytes
SHA-256: 1b3fb1730b5892df3e6a140bb3120c7b48207db250c5118cf3ca7fcb0b1c585a

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