Malicious PDF — malware analysis report

Static analysis result for SHA-256 70d2ba65ab150e51…

MALICIOUS

PDF

72.8 KB Created: 2021-09-02 15:47:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: e33cebc0b23f717ba8fc48be0b6bee88 SHA-1: e55a89bc41c73902e8e1ca30d49dc4cf367d6bab SHA-256: 70d2ba65ab150e51484b1cc6dbc8fd27fe8bbcd170337323c1a226cacc3e4548
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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 http://tauben-buchmeier.de/kleinberliner-schuetzen/userfiles/files/41550051417.pdf In PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/9c436d3e950a1f909493d1b6a30c8b26/24628627482.pdfIn PDF document text
    • http://akifkasaboglu.com/esatfisek/images_upload/files/zazulasu.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611d27b8668c3---wodadipokixunekigerike.pdfIn PDF document text
    • https://dutchfansitenetwork.nl/ckfinder/userfiles/files/81264346116.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094582ec8d7e---52152699458.pdfIn PDF document text
    • http://zbraneklapka.cz/ckfinder/userfiles/files/zosodisusezatobe.pdfIn PDF document text
    • https://reflexlighting.com/wp-content/plugins/super-forms/uploads/php/files/e3d551a6f2e096fc87925471fb816531/44117769446.pdfIn PDF document text
    • https://at2-turbo-j3t.com/contents//files/xufesofunasidisu.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607b03af19890---25705468762.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/b4kgs8aqjp68j2fkehl74fe6iv/20000239275.pdfIn PDF document text
    • http://architettodrabeni.it/userfiles/files/fixodujejum.pdfIn PDF document text
    • http://aedelsur.com/contenido/files/37649582873.pdfIn PDF document text
    • https://bibliothequedesarts.ch/ckfinder/userfiles/files/zopewigipataxovep.pdfIn PDF document text
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/54c2ccffbcc48e10360c02cd935951c5/titadot.pdfIn PDF document text
    • http://peaceinsrilanka.lk/userfiles/file/43311136636.pdfIn PDF document text
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/1608424d7e1f60---fofobakonodujoluwiwiwomer.pdfIn PDF document text
    • https://easypayindia.in/userfiles/file/62233014373.pdfIn PDF document text
    • https://path.mn/userfiles/files/5224964923.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/a2gee92qgtlc70nqcdurg999pi/tumetezigun.pdfIn PDF document text
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/88b35be7615bfb8cc9bcdcf4fd69ee12/teted.pdfIn PDF document text
    • http://thekitchendesignstudio.org/uploads/files/mepoxodasikovaxozulalexi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=parabolas+in+vertex+form+worksheetPDF link annotation
    • 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_off0000ba86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA86 16180 bytes
SHA-256: b076fe7dd621d32b5297c54fb84b34391f97f72a8aa81cb825a09990c3856e06
font_01_sfnt_off0000e453.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE453 10968 bytes
SHA-256: 6fa98d00798d27c73127616432d40a32666c2a1552a27ee3e4fd843f70c3075f
font_02_sfnt_off0000fda6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDA6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1