Malicious PDF — malware analysis report

Static analysis result for SHA-256 560fac70ac4ba852…

MALICIOUS

PDF

81.7 KB Created: 2021-09-16 21:05:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3a7610b442c63b98ec06fd285d83a502 SHA-1: eac1519a14838f146d326b819365c4bb83fecd67 SHA-256: 560fac70ac4ba85204528a1f5a78151dee137f53e93f7a3a7ecf3d978f0c12ce
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress uploads, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution through these external links. No scripts were extracted, and the document body was unreadable, so the analysis relies on the PDF structure and URL heuristics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/472526ff97be769ab0219282e152feb5/26905242819.pdf
    • http://sportsgarten.com/editorData/file/sorubotulete.pdf
    • https://burkina-businessschool.com/business_school/uploads/file/10330122191.pdf
    • http://ovartec.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e24167528b---98003095239.pdf
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/161319d3a91925---jegakevaxasijuwufemagol.pdf
    • https://mimpishio1bet.net/contents/files/81475481598.pdf
    • http://newtarrytowndeli.com/uploads/files/waxegokope.pdf
    • http://www.anclupnapoli.it/userfiles/file/60636361211.pdf
    • https://photopoligrafic.ru/ckfinder/userfiles/files/15176037191.pdf
    • http://polkovnik.su/upload/file/54141759278.pdf
    • http://lobi.md/userfiles/file/zodojezuruf.pdf
    • https://aznamaste.com/ckfinder/userfiles/files/manubixinitudeg.pdf
    • http://cmtoolsrental.com/user_img/files/dedalotagugozo.pdf
    • https://tinnituskozpont.hu/files/gevofikuz.pdf
    • https://samarthanamparisara.org/apadmin/uploads/userfiles/files/zozunaj.pdf
    • https://uzsienis.cvzona.lt/resources/img/files/31287682799.pdf
    • https://delphin-restaurant.com/ckfinder/upload/files/joref.pdf
    • https://xn----7sbeo1acdy3adh.xn--p1ai/userfiles/file/lokemeditagixenosafabumod.pdf
    • https://www.clinicaepilepsia.cl/ckfinder/userfiles/files/13099860358.pdf
    • http://stapper.de/sites/default/files/userfilesfile/5982549430.pdf
    • http://61kidsclub.com/userfiles/file/kezuzokunukeg.pdf
    • http://sostrevalli.it/userfiles/files/64576557507.pdf
    • http://elcwma.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/musuvewupu.pdf
    • https://herfection.herfection.tw/upload/ckfinder_temp/files/20210901224652.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=convert+html5+to+android+app
    • 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_off0000d779.bin
a87b0ae3dac02c1ca334c0af5aeefe1226dd83f1cd3cc72ec04e28795bb33787
pdf-font-stream PDF embedded font (sfnt) at offset 0xD779 18640 bytes
font_01_sfnt_off0001087e.bin
8908b95a98a81aac4b36cf660e62625293528c19d69b77b4218de2d150791437
pdf-font-stream PDF embedded font (sfnt) at offset 0x1087E 10720 bytes
font_02_sfnt_off000120f9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x120F9 16792 bytes