Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6975bad3105df7c…

MALICIOUS

PDF

84.8 KB Created: 2021-08-16 08:49:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 511ce14713f6cba961af66d37a79566d SHA-1: e48625027bad524a8b030945090c22b399d4f17a SHA-256: d6975bad3105df7cfe55016adbc85a165edb332fb09fd4886d2ea807e3ec298f
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other disposable hosting, likely intended to lure users into downloading further malicious content or engaging in phishing activities. The presence of multiple distinct hosts and the use of UTM parameters suggest an attempt to obscure the true malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097abe431866---47248884964.pdf
    • https://gadesign52.com/uploads/files/202108140254559773.pdf
    • http://www.haztartasigepszakuzlet.hu/pics/file/dunilokutusavuju.pdf
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d4b69fa3462---15456130919.pdf
    • http://dorrstrechy.cz/UserFiles/File/27013786768.pdf
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/e6dd4f197ebd05e1f4b80c87ddef7e4c/dutajojeta.pdf
    • https://aakritidigitals.com/userfiles/files/37623030272.pdf
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad16b601115---1326083004.pdf
    • http://babywagen24.de/userfiles/file/buzevusatigo.pdf
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca3598411d---49911532830.pdf
    • http://df-2.de/images/daten/file/12509271144.pdf
    • http://tnslib.su/userfiles/files/nilomajefiledo.pdf
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073165d4f941---zupuxatokukusa.pdf
    • http://ranch.pl/files/file/fesoralopegarifobigorevog.pdf
    • http://greenhere.cn/upload/ckimg/files/202108042201038935.pdf
    • http://maychamsocda.vn/images/userfiles/file/60414101144.pdf
    • http://shengnabei.com/uploadfile/file///2021072209191249.pdf
    • http://beastyenergy.com/userfiles/file/lezes.pdf
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607f604fab98b---16929260580.pdf
    • https://gwynharmon.com/home/gwyn/public_html/ckfinder/userfiles/files/88236644839.pdf
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/a06c732a4348ef9ae7f549e5c2597a2d/75083927601.pdf
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fb7e8b29ef3---37255484035.pdf
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/160afa6d18f2a4---66158012304.pdf
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a48aa316a6b---96988313620.pdf
    • https://kermoulin.com/userfiles/file/79955443957.pdf
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/b4cdd6accfd6901f3ef3259e6a93dc4b/54309856991.pdf
    • http://nazycakes.com/userfiles/file/46329509515.pdf
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/2eb9600933125904e87795fe382a96f3/91832304776.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=how+to+connect+bose+700+headphones+to+tv
    • 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_off0000e411.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE411 16792 bytes
font_01_sfnt_off0000fc28.bin
d07edb5e0cd8df61b1dbd68ddf465a2fd246351258ee50d74b3af46c9bc3ec63
pdf-font-stream PDF embedded font (sfnt) at offset 0xFC28 10828 bytes
font_02_sfnt_off000114eb.bin
e7657ee36406f166d9a339bbe8432cce7735881edddd4dd9a4a3aef72363c78f
pdf-font-stream PDF embedded font (sfnt) at offset 0x114EB 17484 bytes