Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e07fc6bf02ded57…

MALICIOUS

PDF

84.9 KB Created: 2021-09-03 04:11:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: d6d25e192da640b35d5a77a2ff12fb3b SHA-1: d42e420521552e6d2f8274419ecdebf15e39ea38 SHA-256: 2e07fc6bf02ded575046a737c93f010fa6ab1ee33d50ccfedc12012082241ab6
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs that point to external resources, some of which are hosted on compromised CMS upload directories. The primary purpose appears to be directing users to potentially malicious content hosted on these external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://mobydick-band.de/fckdata/file/kotasamotudubimevuzopon.pdf In PDF document text
    • http://aristosaigonhotel.vn/uploads/files/gewuwibalo.pdfIn PDF document text
    • http://studioschicchi.eu/userfiles/files/zorigipu.pdfIn PDF document text
    • https://corianderedmonton.com/ckfinder/userfiles/files/17864692156.pdfIn PDF document text
    • http://rmgoals.com/userfiles/files/vavidajikuwufewiwinatom.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/pesef.pdfIn PDF document text
    • http://mobilenmr.com/files/files/47630553126.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/b4416d0cee81f1f93a2ec9c0a6f38030/dunerodojaguxi.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/8e9ed5925321475546a33a9a0620cce4/xopevu.pdfIn PDF document text
    • http://gainliving.com/upload/editor/file/zegepej.pdfIn PDF document text
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/89h927gas2taadk8iomkf8evk5/26660681400.pdfIn PDF document text
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/k4ogts8s5h4hm4ukc14oig5prj/16166749392.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/2cifo1t8eat5j071les4g7kq60/40099122576.pdfIn PDF document text
    • https://hgb.se/filer/file/87722502438.pdfIn PDF document text
    • http://bearings-home.com/userfiles/file/tutitugepadozizarepemi.pdfIn PDF document text
    • https://pilotcenter.gr/wp-content/plugins/super-forms/uploads/php/files/saevf376vl809epuislb29i5s7/96941954992.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3e2d9b7738---devatifaresisumizi.pdfIn PDF document text
    • http://teacherandtraining.com/coj_u/KK/userfiles/files/15525952020.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/0d0f689e12de2f4f6b0abc9dc0d1ebea/18345068122.pdfIn PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/16071751b9df23---pimekup.pdfIn PDF document text
    • http://ubytovna-krumlov.cz/userfiles/file/29618856120.pdfIn PDF document text
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606c840da3a14---walezuzebajamezib.pdfIn PDF document text
    • http://shosholoza.de/file/10399056536.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=clsi+breakpoints+2019+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_off0000e34a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE34A 18676 bytes
SHA-256: 3ef3ed3bcf1fdc521174ad5c62280fa8635b3a2e2f68ce4b1f907f37b095ca01
font_01_sfnt_off00011407.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11407 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012c1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C1E 11216 bytes
SHA-256: 1e349089d5cc96305031b6de0e3b0634f4405d63e0e1123350f13b5f893ca531