Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e9344203fc451d3…

MALICIOUS

PDF

95.5 KB Created: 2021-07-08 10:32:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5e7898f6d5e5646de461f998ce62e677 SHA-1: da91bd2d1fd2ba7d5c5a5e26cd734592b0365d47 SHA-256: 9e9344203fc451d3870ffa4a628c284ce5866c46823961717465db2a3027ad47
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the overall structure and URL patterns are consistent with a malicious PDF dropper.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9486

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://allytemp.ru/uplcv?utm_term=terylene+is+made+from
    • http://amphorabeautyclub.com/campannas/file/74131228445.pdf
    • http://prabashproperties.com/ckfinder/userfiles/files/66601141852.pdf
    • https://aartipalette.com/userfiles/file/80351961100.pdf
    • https://www.spreefahrten-berlin.de/wp-content/plugins/super-forms/uploads/php/files/lmr3blquel9qsdi1c8mrsqp24h/gelikodilemawezavujokofil.pdf
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/160bd906f68d4b---29582736118.pdf
    • http://www.liveartsaskatchewan.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609672707d44c---xotisosimagigaxujixepase.pdf
    • http://angeladaniel.eu/uploads/files/85979768979.pdf
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb484cd6bd4---kowamiroxetixijukes.pdf
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/l68knlh3g5h6lv3h76c27g13d1/gibeleto.pdf
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/af9d82205a5d48450c86660a21552c5a/bixudogasurukivorobof.pdf
    • http://botosani.ro/img/uploads/file/1593597409.pdf
    • https://k2salight.com/wp-content/plugins/super-forms/uploads/php/files/fc0be58a7123a218c2c2685e2974daf6/kubidebupitavaravalupog.pdf
    • https://aimhc.com/userfiles/file/visatalejuzuvajosi.pdf
    • http://www.redactordecontenidos.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16089431016da5---tasigukuxebuwojuvowav.pdf
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160aa6e8fbba51---gupewefokeza.pdf
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/eda953617f22836a8a86b3186ed9dc95/31887657216.pdf
    • http://www.advokat.com/app/webroot/img/fck/file/kemexesupatifuvupi.pdf
    • http://www.haztartasigepszakuzlet.hu/pics/file/podejinuto.pdf
    • http://bkdesign.ee/userfiles/file/71684379088.pdf
    • http://savalis.ru/userfiles/file/12307233338.pdf
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607aaa274b88d---piwafuzovigatejefi.pdf
    • https://ckmusicdesign.nl/userfiles/file/jisopivufojizizorav.pdf
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16085902155cc3---gatubederavosuridisaki.pdf
    • http://detikakdeti.ru/img/file/mugisirinogere.pdf
    • http://apogeeconsultancy.com/upload/files/57104708289.pdf
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160838790a44b6---45273210367.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efec.bin
72e41c46aee6ad094f46bad6089181cfd31e737a54bc6c9cb9112a522ea54183
pdf-font-stream PDF embedded font (sfnt) at offset 0xEFEC 2464 bytes
font_01_sfnt_off0000fac8.bin
e6176b9ecd4f811e7425b90fcef7d8b717470c0e63cf9135bba8271e87265805
pdf-font-stream PDF embedded font (sfnt) at offset 0xFAC8 10492 bytes
font_02_sfnt_off0001129e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1129E 16792 bytes
font_03_sfnt_off00012ab0.bin
76facf8b0d74198eb4bb9daaa12fbfa05bd25a2c93a79a74d0bd60badfcd657d
pdf-font-stream PDF embedded font (sfnt) at offset 0x12AB0 17652 bytes
font_04_sfnt_off00015739.bin
3549540945f93769c9883ac6355213a62b624b0c009f2f339498362b612676f5
pdf-font-stream PDF embedded font (sfnt) at offset 0x15739 16580 bytes