Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ca308457304e232…

MALICIOUS

PDF

83.2 KB Created: 2021-08-18 23:48:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 2ddf76b2beabe0d17db852ee74d9c3ef SHA-1: dd42ce9733fccebe3aa7d3eedbf00df655f38144 SHA-256: 7ca308457304e2328aadbf9d20421ebb9a4f346175486cdfa8cb3eef83466d56
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable domains, suggesting a link farm for phishing or malware distribution. The 'utm_term' parameter in one URL indicates a lure related to driver downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://philabc.ru/uplcv?utm_term=intel+usb+3.0+extensible+host+controller+driver+windows+10+dell PDF link annotation
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/161168660f10b6---zeguged.pdfIn PDF document text
    • http://adams-gold.ru/archive/image/file/xokuzuz.pdfIn PDF document text
    • http://liubeauty.com/luutru/files/11758086270.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c99300e134b---pewupurogufikogonojanaku.pdfIn PDF document text
    • https://samowar.me/userfiles/files/57344667500.pdfIn PDF document text
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb9a5221cb---xuxorepoxe.pdfIn PDF document text
    • http://pinturasoltra.com/images/slider/files/444307559.pdfIn PDF document text
    • http://beveragesgs.com/userfiles/file/lutadumokuxale.pdfIn PDF document text
    • http://bptramptour.pl/files/file/wigugonoxukijaxib.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160ace84e5432e---1896791056.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/160a3563d9707b---fifupogofetakixexazuk.pdfIn PDF document text
    • http://cameragiaminh.com/upload/files/49415523133.pdfIn PDF document text
    • https://tselectromechanical.com/uploads/CKfiles/files/nupumagizujutizeto.pdfIn PDF document text
    • https://olmitek.by/wp-content/plugins/super-forms/uploads/php/files/o2bg5tp6c98ijllusa9i3ico65/85414536499.pdfIn PDF document text
    • https://www.mysmilestudios.com/wp-content/plugins/super-forms/uploads/php/files/3370f508a91e15bb8529dc1eb4f00138/23276598076.pdfIn PDF document text
    • https://jamisonfurnace.ca/userfiles/files/58148022884.pdfIn PDF document text
    • https://eravukappalpalli.com/userfiles/file/6047049289.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/1606d365a81779---88872085861.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160735b7d3ee48---xakifokomemow.pdfIn PDF document text
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/l3e65dfem5lul4mhu7be0is18r/77896979670.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c6c5b0f722---nanamilub.pdfIn PDF document text
    • http://challendor.com/fckeditor/upload/file/29156322040.pdfIn PDF document text
    • http://jcon-aps.dk/userfiles/file/dudavugojoji.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF30 17196 bytes
SHA-256: d5623362701b635183649fb045201e6d7f14cb7368ec7c40363d3315961cacdb
font_01_sfnt_off00010c3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C3C 11160 bytes
SHA-256: b570895600222c67aac61c8ef3cf8aa4f83d3371f9fc22485575f5f990290f45
font_02_sfnt_off00012669.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12669 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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