Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f2ca43969f493d1…

MALICIOUS

PDF

79.4 KB Created: 2021-08-09 15:56:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 74172aae3a7e9a4f57b045bc8624f15d SHA-1: 9f9eeb9dbedd5690a9a957faaa3babbcfb336e59 SHA-256: 2f2ca43969f493d1b709a64f5e94d5fb6fb777998db92cca00e424f76c8466a6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised 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 structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://listapp.in/ci/userfiles/files/30151538207.pdf In PDF document text
    • https://bataretak.com/img/files/file/wepedegigazezaluwozo.pdfIn PDF document text
    • http://www.awakohchang.com/image/upload/File/ijasijazaweka.pdfIn PDF document text
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/1de22ed0a70ccdc3e185cb70300116a9/kebujixi.pdfIn PDF document text
    • http://fotografiafrancescosomma.com/userfiles/files/5451624359.pdfIn PDF document text
    • https://hashtag.school/userfiles/file/87500758925.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/i2aj39j97vpmqr0famsvg9mki1/45737786221.pdfIn PDF document text
    • http://www.nomorcantikjoss.com/file/dojevo.pdfIn PDF document text
    • http://xn----8sbaqfskngn1qi.xn--p1ai/userfiles/file/lolufadopesafujozezibaw.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608a47ff4fc1d---48361109496.pdfIn PDF document text
    • https://mosconi.net/userfiles/file/19577575950.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/16090e13cd7ffe---zalisexusofogogibuwedogu.pdfIn PDF document text
    • http://karinameal.ru/imgdish/files/2942560053.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/d1uj6c3dbtakich2gleg089ui8/pefavugirolerijowob.pdfIn PDF document text
    • http://autodilykanka.cz/cmsimple/images/file/jiwoz.pdfIn PDF document text
    • http://ferrocom-spb.ru/userfiles/files/77117107450.pdfIn PDF document text
    • https://leesman.com/wp-content/plugins/super-forms/uploads/php/files/d3d37bbde54fde841c99b93b8f54e2f4/35807519930.pdfIn PDF document text
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160973c1bca3f1---memux.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/735763adf25a23962b4f99faaf7b7ebf/85256262845.pdfIn PDF document text
    • http://ohappy.org/userData/board/file/gakolakelopaluxore.pdfIn PDF document text
    • https://centrobrands.com/wp-content/plugins/super-forms/uploads/php/files/9e88d747db0fcc5292f58b02e9b7fe26/vesovod.pdfIn PDF document text
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/gqktc51fg3m1ttpb20pbl15d2s/dejujamamoxosixuva.pdfIn PDF document text
    • https://honghow.com/ckfinder/userfiles/files/nusuga.pdfIn PDF document text
    • https://iamtimeshare.com/userfiles/file/16852213721.pdfIn PDF document text
    • https://maychieuvinh.vn/upload/files/kirelijupugifolixiv.pdfIn PDF document text
    • http://streetnn.ru/data/upload/ck/files/45597832121.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=miro+clash+royale+mod+apk+unlimited+everything+v2.4.3PDF 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_off0000cf4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF4E 16992 bytes
SHA-256: e59a30ab1d526f145b133f1ba7fd9494ed6a1f274e5a531913a09f6a0037b16a
font_01_sfnt_off0000fb9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB9A 11764 bytes
SHA-256: ba1ad24469824d96ee24ee91f0c7a14015b908520db0fec00ce3656c5aab7374
font_02_sfnt_off0001177d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1177D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1