Malicious PDF — malware analysis report

Static analysis result for SHA-256 7162f9a08c1f553c…

MALICIOUS

PDF

74.4 KB Created: 2021-09-07 00:17:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: d92821acce93568f06b3be29a0b79a4f SHA-1: f0f62b1d992e1b2f135cced4eddff6f4e875a783 SHA-256: 7162f9a08c1f553c3eeacc78267db112b31eb9fd5678caf81955b6dd510571e6
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample contains embedded JavaScript, a common technique for executing malicious code within PDFs. It also features numerous external links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a817825fa90---97799865159.pdf In PDF document text
    • http://clair-environnement.eu/catalogue_dynamique/file/pivesazekanamiwi.pdfIn PDF document text
    • http://therealmccoyfamilyreunion.com/clients/f/f9/f9ea119420dddc0cc5ac7622830b9f68/File/dotarun.pdfIn PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607733b349226---zejapam.pdfIn PDF document text
    • http://burningspearmarketplace.com/js/ckfinder/userfiles/files/1585937193.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/161007daa0c21c---toxiredewanatibameverim.pdfIn PDF document text
    • http://homelife-superstars.com/image/files/50673967971.pdfIn PDF document text
    • https://etimes.mn/uploads/files/gejemagogu.pdfIn PDF document text
    • https://anitt.in/ckfinder/userfiles/files/buwulebovup.pdfIn PDF document text
    • http://newtarrytowndeli.com/uploads/files/22400165442.pdfIn PDF document text
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/8eda6cc409a0b5aa38789a50361c67f7/lazes.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/160809ad2080aa---moluxapotunavofujurax.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085054cca245---41991674421.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4393357f7a---21350208677.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc626fef0f1---xobenodupi.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/4juj0lveqkjvre14l1jaq3sptc/72524685048.pdfIn PDF document text
    • https://sporyolu.com/resimler/files/77476531405.pdfIn PDF document text
    • https://sckprime.com/wp-content/plugins/super-forms/uploads/php/files/1e34f9c2a937e65218b38356a28deb8f/modepe.pdfIn PDF document text
    • http://pbhdom.eu/userfiles/file/27437581742.pdfIn PDF document text
    • http://jshtextile.com/UserFiles/file///tuwonew.pdfIn PDF document text
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1a246d5791---95883119040.pdfIn PDF document text
    • http://lpsa.cz/userfiles/file/79868880559.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=vairamuthu+books+pdfPDF 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_off0000bdec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDEC 17960 bytes
SHA-256: 6617fb19159877950ee916d85291c36713c49dd4cbc40051cb8d13a969ac8644
font_01_sfnt_off0000eb82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB82 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010399.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10399 10780 bytes
SHA-256: 7c849a1c12cce0d357972d5c1fb7e1877fa5dab8046e70e77260dc9bac1aa975

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