Malicious PDF — malware analysis report

Static analysis result for SHA-256 d787067a742e2f0c…

MALICIOUS

PDF

92.5 KB Created: 2021-07-08 04:13:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1a7ab2d971e11b138e4fea36e64a9f50 SHA-1: 2dca071d49113acbd0c87348c353b8923d6ed15f SHA-256: d787067a742e2f0c206ff63d5eaabc698a0928d8759db29bb13fb706e4d161f7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm pointing to multiple compromised WordPress sites, indicating an attempt to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body is unreadable, but the heuristics and URLs confirm the nature of the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

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://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160716b437ede4---mexenedemo.pdf
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160948040f2585---93883625159.pdf
    • http://anma.pl/anma_edytor/file/25904304061.pdf
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/a9a184297adbdf7aef83c7501efdd9cd/supipenepozedamabikozojun.pdf
    • http://www.deep2001.com/images/library/File/rizofa.pdf
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/dd744417aa7bffd9f09f1047a417f0fd/96889014855.pdf
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/5ugu9n0409hkppce5sc5frga82/muzominiro.pdf
    • http://adainst.com/uploade/files/20210621134627.pdf
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1608274ae83581---50797629697.pdf
    • http://graviroz.hu/ckfinder/userfiles/files/powezozofefamovozukiwop.pdf
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b1445c00820---57325470717.pdf
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/b030d80d484fb1510645cd6a3b00b75f/wezafetivaxe.pdf
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1416872815---25027883301.pdf
    • http://thepokewave.com/uploads/files/6755089659.pdf
    • http://www.kymenhome-etsinta.net/tiedostot/files/lunogavowuvusedinoturir.pdf
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba5dc40f273---zukodepitifuva.pdf
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c8db2e5a393---zuwaxelulaluxej.pdf
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/b0326ef5817b9394f0fcfeae874c3a8b/fanifedojexabo.pdf
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/113cab28e0013ed28c37784139b7c999/99034755137.pdf
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/0gcthnimq3ljkcu3irpd4ophl4/41672355178.pdf
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/15da8bb4cb7c51cc87775cffe90ae4b0/lizujibig.pdf
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/160743ce2f3eff---55657703027.pdf
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/m2ueglal2k8c0fps1643oaf7ss/92345213062.pdf
    • http://naviway.su/upload/files/guromenabakelada.pdf
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160928b1aded91---dufejukozawevaturipif.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=rose+day+quotes+for+girlfriend
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efbf.bin
d3bdd7c88876a2cfbfe2c404fa3110a187c337f9a6a4d725aac96574f5e34072		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEFBF 17220 bytes
font_01_sfnt_off00011c21.bin
b0d0952d3e590403c43a27647ef8a8ec5e0ca8aa71a96e94f24a094d9c09295f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11C21 16720 bytes
font_02_sfnt_off00013323.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13323 16792 bytes
font_03_sfnt_off00014b3a.bin
910609263aea56327258c92447281856ac340a3ccdfe33096a0d61984dbb0e5f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14B3A 10936 bytes

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