Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c6d7c150c6685a9…

MALICIOUS

PDF

85.0 KB Created: 2021-07-01 13:12:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5a06b6773e90b24e55d51d5784e3709f SHA-1: a58ee82c855bb789371cdf2743a70eb7832d84b8 SHA-256: 9c6d7c150c6685a96b399293094028166a83bcddab3459611881b9d0b7392fb2
176 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the prevalence of suspicious URLs is the primary indicator of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://imaginove.eu/data/Files/lukopigusizukofib.pdf
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ca6854b0176---52299604625.pdf
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a2fd23794e---98879209213.pdf
    • http://thongthien.vn/upload/files/93263697284.pdf
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607c45fdd9401---nasupa.pdf
    • https://yalcinplayer.com/calisma2/files/uploads/86593766160.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f5ba2922f4---6709528214.pdf
    • http://amghanoi.com/images/ckeditor/files/4940781350.pdf
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/old8anqdklsgke5opijc9a0arh/xeverepizeroxol.pdf
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608604a6a661f---jinekodugeporupuxubexifu.pdf
    • https://www.engltg.com/wp-content/plugins/super-forms/uploads/php/files/8e6b301336c7904e2a515698ba75afd0/rofobatusojok.pdf
    • https://kajariaadsevents.com/admin/uploads/file/kevoredunefisabo.pdf
    • http://madmojo.com/fckupload/file/30939573306.pdf
    • https://daleel.global/wp-content/plugins/super-forms/uploads/php/files/qu1eo621c4c7mkbuheavfpd9hi/83006174941.pdf
    • http://albino-pitti.com/pub_img/file/12722308547.pdf
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/hml7osgrchc426odrvnk9hf881/zutijitilurebutilipogom.pdf
    • http://orbitsecurity.qa/pro_mvp_tech/uploads/file/51873040058.pdf
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/a72uh85moje77phr9hc6dm29o6/99477315860.pdf
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/5e8895f6f77e3010576d54844df06eb3/nukolunupulidozipi.pdf
    • https://tipresentoio.it/images/file/nodifasatifiwukikulev.pdf
    • http://painttechvina.com/webroot/img/files/13923584712.pdf
    • http://theettiaresmontreal.com/clients/f/f0/f03dfc1790708d0b03c48e9879ef2ea6/File/fiwijerejinun.pdf
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608971fa135e6---70419521776.pdf
    • http://157.230.241.115/image/upload/File/sazudasixigarepewukizig.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=cad+drawing+to+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_off0000ea96.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA96 16792 bytes
font_01_sfnt_off000102ad.bin
b46a9b1772e59a317d90c7dec025c4cdc5be72e44a845c94969e8648b60a9db4
pdf-font-stream PDF embedded font (sfnt) at offset 0x102AD 10444 bytes
font_02_sfnt_off00011a4b.bin
fea1e996ef83d50cf06961e179bb66ee44f2a2040c1ae8f37e6bbfa457680576
pdf-font-stream PDF embedded font (sfnt) at offset 0x11A4B 17144 bytes