Malicious PDF — malware analysis report

Static analysis result for SHA-256 95ed2fc4f2e443de…

MALICIOUS

PDF

83.9 KB Created: 2021-09-04 12:08:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 0b979eaf69df81b99d6263e634f585b7 SHA-1: cec35ee0b5a6d7278f90521b84989d50a2be3802 SHA-256: 95ed2fc4f2e443de3da3c433ccf93b86d460a493e25e30c5680bf5f7bb5dbc16
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious. It contains numerous embedded URLs, many of which point to disposable hosting or compromised CMS upload directories, indicating a link farm designed to redirect users to malicious content. The presence of these link farms suggests an attempt to disguise malicious destinations and potentially phish for information or distribute further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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://itps-group.com/uploadfiles/file/nizorisivavogig.pdf In PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/64fa9e706c4e1f66df0a97013b93d4ee/52063946216.pdfIn PDF document text
    • http://villabrown.it/userfiles/files/28284828559.pdfIn PDF document text
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d23fa5caacc---sujanavovogupojojokojosab.pdfIn PDF document text
    • http://lso-msm.fr/userfiles/file/pavakesafib.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afd14b7645a---rotixitam.pdfIn PDF document text
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/0nve2m6tlt10abnsagnj15ot1s/sopuvisajufe.pdfIn PDF document text
    • https://confetti-seasons.ru/upload/files/76276056699.pdfIn PDF document text
    • https://ovalpolycoats.com/media/31483516352.pdfIn PDF document text
    • http://kolaykanal.com/userfiles/files/guvufojaximak.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/16083b602baa8c---tafosokoropisure.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607f35ed679fc---30225834383.pdfIn PDF document text
    • http://thuduchouse.vn/pics/file/dipigulutepatinub.pdfIn PDF document text
    • http://goldnumber.info/userfiles/file/38884590149.pdfIn PDF document text
    • http://bishnutoursandtravels.in/userfiles/file/50191949181.pdfIn PDF document text
    • http://alfavit.tv/userfiles/file/31083497475.pdfIn PDF document text
    • http://0-50.ru/userfiles/file/68072073707.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160930d501a7a2---42159136265.pdfIn PDF document text
    • https://autosaloncenter.com/uploads/file/38878249707.pdfIn PDF document text
    • http://kabaretyimpresariat.pl/Upload/file/89035923384.pdfIn PDF document text
    • http://denge.aero/upload/files/60972634661.pdfIn PDF document text
    • http://amsasecretariat.fr/userfiles/file/siwanidasoboxepudilokupi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=bstc+2018+answer+key+pdf+downloadPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d11d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD11D 11368 bytes
SHA-256: 445eab30d3f2486e8d96e1f0a93a4b78b02506c498e527111846d48034941e8f
font_01_sfnt_off0000ec3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC3C 1680 bytes
SHA-256: 6c08887b596ecb472c5a0482df8c2f828d83fc5b5d16111ed0caa1fced1b35dc
font_02_sfnt_off0000f438.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF438 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00010c4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C4A 20732 bytes
SHA-256: e2417fcdb3a93bcd1b5fc7209b126ed026cf6d51bbbddf267de83d9223fe7121

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