Malicious PDF — malware analysis report

Static analysis result for SHA-256 95b6247403ac0d44…

MALICIOUS

PDF

149.5 KB Created: 2021-07-02 07:41:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 968876fc0acf7e0c7ae661f73e771dff SHA-1: 40f854a90c5e873d9d6fb4ceb86e2ca0d9f3341e SHA-256: 95b6247403ac0d448af549f813db52b17cf8b96aeb14daadd48c1cc5447d47dd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links pointing to compromised WordPress upload directories, indicating it functions as a link farm. These links likely lead to phishing pages or further malware downloads. The ClamAV detection and ML classifier strongly suggest malicious intent, consistent with a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9733

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://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/i4polcr4cqs8okjp4hibof96fi/49081647141.pdf
    • https://pirkitpadangas.lt/ckfinder/userfiles/files/10497115948.pdf
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/botiu5nsiigv12qa6sae88sj81/segoku.pdf
    • https://energooptima.hu/upload/File/pokale.pdf
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/4e2ae1d532a65309c62a5d9cd5ca58c9/viwesavaxurotirawux.pdf
    • https://pakianco.ir/data/image/uploads/news/files/19477094176.pdf
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/fpsgnbivca19ufnjjr06orcel0/49997682210.pdf
    • http://aquamedia.cn/ckfinder/userfiles/files/95196179643.pdf
    • https://uclerbaklava.com/resources/file/mazegeziwizuzedas.pdf
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160adb1c77357c---20212469544.pdf
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081809fb3acf---35391759156.pdf
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/r3kqhsf7q93ilha9856m18f0d4/jekep.pdf
    • http://aksaxena.com/bpms/includes/fckeditor_uploads/userfiles/file/zuzezipajevufudowe.pdf
    • https://studio-september.com/wp-content/plugins/super-forms/uploads/php/files/494de35ee4670bcd8cf7788462076bbb/39310838153.pdf
    • https://takeorders.online/wp-content/plugins/super-forms/uploads/php/files/aceduskfhnl2hr0ja9tpmuvqgi/jujobe.pdf
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/6a9aa110cbb9eff18e01698d58eb7e37/fiwumixusiwedeluganilide.pdf
    • http://ibtaker.ps/userfiles/file/91659591561.pdf
    • http://www.jobsincrete.gr/images/_user_na/file/bapokeroxob.pdf
    • http://www.hangmandigital.com/files/file/84772442284.pdf
    • https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/d36dd9612cb73ae2c78d1c484b53436e/vivaviba.pdf
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/08faf1fe9c971720ec9d4237fc89972e/13070212913.pdf
    • http://www.mywil.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16095a9e29f360---rogadinaverolom.pdf
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/iq7n4kdukjinpq8ape8l4pml2m/jiridawasakepawo.pdf
    • https://latework.cz/soubory/kipikusezeboned.pdf
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/52cdf39c0a69091c1d7216acbdb8b82a/77946310074.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=highly+viscous+meaning
    • 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_off0001c63f.bin
e6d93dba913a7b1c68217601c5a11e702a0ee67a6d384cc7017dfe431fed85e7
pdf-font-stream PDF embedded font (sfnt) at offset 0x1C63F 10748 bytes
font_01_sfnt_off0001dec2.bin
70180319962479df4fbfd4179514b0dec12c287b311d6644ec89da625a7ea98a
pdf-font-stream PDF embedded font (sfnt) at offset 0x1DEC2 16464 bytes
font_02_sfnt_off0001f56a.bin
5ef4a7dcbdb6db2ba26c7b25c8a87173a7cad298e96ba8ccd2972f64750abf32
pdf-font-stream PDF embedded font (sfnt) at offset 0x1F56A 22004 bytes
font_03_sfnt_off00022f9e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x22F9E 16792 bytes