Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6206ad53288c894…

MALICIOUS

PDF

85.1 KB Created: 2021-09-09 03:51:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8143bfafbde447f6f0d4ac1d1d1b0acd SHA-1: f8f2388122be62621c45dc1f707845ec4a1bd656 SHA-256: f6206ad53288c89493f5141dad3b5cf98c5e52df5f7048c8be13dea67202c9f7
176 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised websites or disposable domains, indicating a link farm designed to redirect users. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and ML classification strongly suggests malicious intent, likely for phishing or distributing further malware. The file's structure and URL patterns are consistent with a spearphishing attachment used to lure victims to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://wastran.ru/uplcv?utm_term=best+game+hack+app+for+android
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/4c31edd42dca6a179f04f88d6d228502/71643373407.pdf
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/1613554000ed06---buronif.pdf
    • https://pernambucoimortal.com/imagens/files/lubudovixedimomobod.pdf
    • https://unovosti.tv/ckfinder/userfiles/files/29333270463.pdf
    • http://mevlanaasm.com/resimler/files/75668026039.pdf
    • http://densayhongngoai.com/uploads/userfiles/file/74278571867.pdf
    • http://chaodontuonglai.vn/uploads/ck_upload/files/jekatorufulelotisu.pdf
    • https://wyslijpaczki.pl/app/webroot/files/userfiles/file/xuxotosetorejilese.pdf
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/161392efb1a4a1---86559156474.pdf
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161394070a0a4f---32690944289.pdf
    • http://silver.jo/ckfinder/blanc/files/jizidimazojufimubinuzeto.pdf
    • http://c2r-auto.com/uploadfiles/file/2021090714001173499.pdf
    • https://marwaautorepair.com/nbloom/fckuploads/file/mituvitoko.pdf
    • http://panel2conso.com/userfiles/file/xuretutogojedizut.pdf
    • http://studiotecnicopinto.it/userfiles/files/22623396993.pdf
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/16139522c3f572---girabowotaketus.pdf
    • https://europawindow.com/app/webroot/img/main_content/files/95379262544.pdf
    • http://itcck.org/upload/editor/file/95993549880.pdf
    • https://implantsdentairesdesmoulins.com/upload/editor/file/vevinizoxajifujif.pdf
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/da9059a3dbce7b067a8ab09079e864a5/73318621129.pdf
    • http://140.121.161.111/ckfinder/userfiles/files/93505115125.pdf
    • http://vipacademy.org/userfiles/file/55559506694.pdf
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1613600c9eae7a---gazej.pdf
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/16136538aeb181---ravikesi.pdf
    • https://samuelben-horin.com/userfiles/file/79331565439.pdf
    • http://max-metal.pl/gfx/file/vukubugusurojerifuvi.pdf
    • 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_off0000e476.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE476 16792 bytes
font_01_sfnt_off0000fc88.bin
0a2968dd172369be555d6977a4da4ed0443176914f4221d6fcc6330f0cce0cb3
pdf-font-stream PDF embedded font (sfnt) at offset 0xFC88 18644 bytes
font_02_sfnt_off00012ceb.bin
42963295fb84bce21ae690b932fbd648931e48d6c6667077c647031c52e211a2
pdf-font-stream PDF embedded font (sfnt) at offset 0x12CEB 11164 bytes