Malicious PDF — malware analysis report

Static analysis result for SHA-256 aaeda15ae1167864…

MALICIOUS

PDF

102.3 KB Created: 2021-08-10 03:07:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b6cff9790a6ace21a2699259b47606b6 SHA-1: b2f6343b4c84f2587a8ae8a4b6fa0ba36164c9d0 SHA-256: aaeda15ae1167864aa3e2c46fa8688f2cb33dafec12e24c250d6b70d66dc60dc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a malicious PDF by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, suggesting a phishing or malware distribution scheme. The presence of external URI heuristics and link farm detections further supports this. No scripts were extracted, but the overall structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/839974916dfe83dc26e1ee80f26995d5/kotope.pdf
    • http://a-aqua.fr/ressource/site-image/files/koxita.pdf
    • http://re-view.online/fckFiles/file/72757598834.pdf
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/160f41dc85ae3a---tetifatodovexaluzap.pdf
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b5be39b2542---43000959266.pdf
    • http://osc-pribor.ru/products_pictures/file/bovekegu.pdf
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1609ed0a7a322e---36572589537.pdf
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/1f425153dc2b202d1a143b6e980dcf52/pifarij.pdf
    • http://phenix-security.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160763f45404d0---girusigiletoled.pdf
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609682c14d032---zuxawuritepevupesuzil.pdf
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3c09a303a---xubodatuwerukopotalilufu.pdf
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/948d622f28ecc92c5ed69e821a4579a9/sugozipudigufib.pdf
    • http://vom-ragnaroek.de/uploads/file/zubamo.pdf
    • http://bsbcarpet.com/userfiles/file/74567807176.pdf
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16092dbb442700---23165246491.pdf
    • http://sakuragiramenandsushi.com/uploads/files/zonibujevovugote.pdf
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/69fa79dc694fcdda8480160501c644b8/63329622203.pdf
    • http://rld-carbon.ru/file/fatokekemepa.pdf
    • http://gilendor.cz/userfiles/file/99542096046.pdf
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/83665cdb9e98f4cf119f064e53fe5a14/88909021720.pdf
    • http://schodylux.pl/userfiles/file/rusalukujumedevid.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=kitap+%C3%B6zet+%C3%A7%C4%B1karma+program%C4%B1
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012857.bin
e7da2e64a87ad6f3e6b6724ed982dbb58dc408f30e5bd7121ca41b334a343af5
pdf-font-stream PDF embedded font (sfnt) at offset 0x12857 19852 bytes
font_01_sfnt_off0001582b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1582B 16792 bytes
font_02_sfnt_off00017042.bin
dcb414997a58316b093d5e96229a376780d03b8970556bb56fffeef71aabbb7a
pdf-font-stream PDF embedded font (sfnt) at offset 0x17042 10876 bytes