Malicious PDF — malware analysis report

Static analysis result for SHA-256 2002aa972e947313…

MALICIOUS

PDF

81.3 KB Created: 2021-08-05 08:44:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e7fbb83458a364083879ad9746e31ec4 SHA-1: 62ec9e220fde3b9d82f91467e8743c15bc705de1 SHA-256: 2002aa972e94731303d1a1e8ed5ad93d691da943896d36ee4363930bc204341a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable hosting or compromised CMS upload directories, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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 http://www.vandiestbrandstoffen.be/uploads/files/18981678295.pdf
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607d9dd3dada2---mopoxewerunepovefoxu.pdf
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/160716f4f40997---muratiguxomoro.pdf
    • http://bioaec.com/userfiles/files/powofelenamafawu.pdf
    • http://xn----8sbaqfskngn1qi.xn--p1ai/userfiles/file/64725751359.pdf
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/2oop3rqk59dm0g2c4nco9527r6/xuwezilagikivulinimezovi.pdf
    • https://trunglamdecor.com/uploads/userfiles/file/fatarenovoza.pdf
    • http://www.microsinusectomi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075384276fb1---tezakujiminexesibakenagov.pdf
    • http://funperm.ru/content/file/didukozu.pdf
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/ab8257a2d80b3c4ced36718067d1a2c8/55362388804.pdf
    • http://espacioschillout.es/images/admin/file/68932550419.pdf
    • http://maristaslardero.es/userfiles/file/xamaluz.pdf
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/d192fcf196f287be8015d07a312dcb80/89258634902.pdf
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac5ab0ef2bb---2361603837.pdf
    • http://amoy-art.com/Upload/file/mivolemenaremoji.pdf
    • http://polskienarty.pl/data/aktualnosci_imgs/file/58086140619.pdf
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/3209c2aabd975e75e162c70b0de85f0b/kudadajifi.pdf
    • http://thegibbsfamilyreunion.com/clients/d/d9/d929505c7faf6263097cc97620c39d65/File/fajamowexenofawenalete.pdf
    • http://cheapmarkt.com/userfiles/file/xadulivofewu.pdf
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607441e0d0440---besijimawufubu.pdf
    • http://bobiniauto.com/userfiles/file/1631496879.pdf
    • http://dzstock.com/Upfiles/file/gelepixakav.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=don+giovanni+la+ci+darem+la+mano+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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d7d6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD7D6 16792 bytes
font_01_sfnt_off0000efed.bin
6021a9b139d1aa4ac57c99fe086a1190b07ac9615fc12a21e93b09bab9f0babd
pdf-font-stream PDF embedded font (sfnt) at offset 0xEFED 10764 bytes
font_02_sfnt_off00010875.bin
5ef02dac25f6cb32f9ea78626589cdf62ed2e0b33535f7b91f0bb407b5797c6e
pdf-font-stream PDF embedded font (sfnt) at offset 0x10875 18428 bytes