Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0df2ce5be5bee83…

MALICIOUS

PDF

84.4 KB Created: 2021-09-08 01:57:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: e191f9ae39656ad5315e4f4499b0488b SHA-1: 2893953e6bd6a7cd1210d4641866e2085277dc4f SHA-256: d0df2ce5be5bee8320d2424aa078992afdb5bda6437a86402d8a57e04cdd1b3f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 https://allytemp.ru/uplcv?utm_term=gate+smart+lock+manual PDF link annotation
    • http://aodaibooking.com/FileData/ckfinder/files/20210706_F1177DA48BC30FD3.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f078312cc6---11244390222.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ba77ca63aa2---85792106118.pdfIn PDF document text
    • http://www.electricman.in/demo/frontend/web/uploads/files/17162895134.pdfIn PDF document text
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/nadvre4cgfl2ilvg3770f721ka/mukosetixetumin.pdfIn PDF document text
    • http://ziva-muzika.cz/files/file/53455071258.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/8c14adef3697ff187eb93edd33b8f2ca/perugavenigobozob.pdfIn PDF document text
    • http://comp-art.ru/userfiles/file/30179605373.pdfIn PDF document text
    • http://infinity8talents.com/userfiles/file/jejukukab.pdfIn PDF document text
    • https://prosperitas.be/data/assets/file/vijobasisipovizegavego.pdfIn PDF document text
    • http://01host.ru/userfiles/files/tekibodumeniwarawezoz.pdfIn PDF document text
    • http://alexforstarlight.com/clients/4/41/4125d763bdae894b2c088b8c4c0f4705/File/liran.pdfIn PDF document text
    • http://myucmas.com/userfiles/file/29013813023.pdfIn PDF document text
    • http://kulturazebrak.cz/userfiles/kadirokovusap.pdfIn PDF document text
    • https://towa-aaa.jp/userfiles/file/30417817893.pdfIn PDF document text
    • http://mdbim.pl/ubezpiecz/obrazy/file/53048357459.pdfIn PDF document text
    • http://storemisr.com/uploads/files/gerologibaworuvineraxobam.pdfIn PDF document text
    • http://www.thaiboat.net/image/upload/File/funukimabosezimewi.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16072247f77d3c---13969331634.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/160b9365ccc607---34890742037.pdfIn PDF document text
    • https://milsagliksen.org/upload/ckfinder/files/duzomox.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7fbd231ade---77452213702.pdfIn PDF document text
    • https://cam-ceeds.org/ckfinder/userfiles/files/kibazikiwuv.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://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_off0000e8f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8F8 16588 bytes
SHA-256: 2cd02ec0e7b87d30d460c932db3fc5053204df56d3b934ce9a6b65dadbf1b60c
font_01_sfnt_off000113cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113CF 10528 bytes
SHA-256: d4384e2c7291caa5c4a99fa41b93eebd874c4ab9776db68424133924accece83
font_02_sfnt_off00012bdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BDD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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