Malicious PDF — malware analysis report

Static analysis result for SHA-256 29315367cc397d65…

MALICIOUS

PDF

95.8 KB Created: 2021-09-03 03:21:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: c8810d5ce2dc48445976c4884ef213ee SHA-1: e5d54b235b47fadb7c5c23e6bfd783a8057389f2 SHA-256: 29315367cc397d65f02c87273ef9b89e3ed88b5a18a68bbd72206a13b0bcf4af
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with many URLs pointing to potentially compromised WordPress sites or disposable hosting. The document body was unreadable, but the presence of numerous external links suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9888

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://formel1vermietung.de/userfiles/file/37724648596.pdf In PDF document text
    • http://asu78.ru/userfiles/file/94498889450.pdfIn PDF document text
    • https://thefertilizergranulators.com/d/files/zuvejeravoze.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/16071940e5a6ab---delupimuvalaralafudew.pdfIn PDF document text
    • http://myhomeinparis.com/userfiles/files/xarikuso.pdfIn PDF document text
    • https://schmitz.cz/res/file/wexem.pdfIn PDF document text
    • http://turhantur.com/turhantur/files/32400560577.pdfIn PDF document text
    • http://nghiencuuykhoa.com/uploads/userfiles/file/78950037147.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074b3c44a065---suwadelenanolixobukemid.pdfIn PDF document text
    • https://www.oalysa.cz/ckfinder/userfiles/files/64386904112.pdfIn PDF document text
    • http://retroldn.com/userfiles/file/40859968416.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607563348e8ab---lilefaxowaxobodusivon.pdfIn PDF document text
    • http://ajivikafinance.com/userfiles/file/temezon.pdfIn PDF document text
    • http://elementsgogreen.com/userfiles/file/55766503300.pdfIn PDF document text
    • http://alianzablue.com/aym_image/files/wofox.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/70293ebad3d468900d51b33d8dbc0eef/91871918866.pdfIn PDF document text
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/c2aro9itjpabm4l46a1q60oiq2/kutesezofunitararaf.pdfIn PDF document text
    • https://ensasoft.com.tr/wp-content/plugins/super-forms/uploads/php/files/j5f18c0epcpcf2d2ligkblcq9n/24646359212.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd2a708a8fe---lojavudokuzijudisabim.pdfIn PDF document text
    • http://mya1fc.com/files/ckuploads/files/zagoxujegeb.pdfIn PDF document text
    • http://hoangle.vn/uploads/userfiles/file/89886409612.pdfIn PDF document text
    • http://douzonebnf.com/upload/file///zalukev.pdfIn PDF document text
    • http://hanasushimenifee.com/uploads/files/59173653698.pdfIn PDF document text
    • https://ascinfratech.com/clientprojects/trading/file/gelovava.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/22qa049g1d19a2fjhedf0916oo/370613172.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160719734ddddb---60739925273.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=comportamiento+organizacional+pdf+robinsPDF 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_off00010d69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D69 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001257b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1257B 19492 bytes
SHA-256: 16d8a44771627a1f4d5662fe10885e85e255cccb240a406b708d77d9eeea6afa
font_02_sfnt_off0001573c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1573C 11196 bytes
SHA-256: 3a750e561a1524a8eb986bf626b745442f4fa47ff406cfdefd6b136f3cae7215