Malicious PDF — malware analysis report

Static analysis result for SHA-256 46e33bdb1bd82268…

MALICIOUS

PDF

84.5 KB Created: 2021-07-07 21:24:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f050d176b5cffd8db7e5b4e10b4e802f SHA-1: 2e6564b808cea8c1af04fc29a9b3a256a2b2ad4e SHA-256: 46e33bdb1bd8226823f278d1ad393aeb863f1ec05e4cfba8f9599dc78e9662ff
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many of which point to compromised CMS upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded URLs suggest a link farm attack pattern designed to leverage compromised infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/e37e37c331444b9b6cf31dbce053a148/govigusubawufi.pdf
    • http://www.jindatunnel.com/up_files/file/sijajotuzuwogula.pdf
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16071c6205ae5b---90896182361.pdf
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/evlirttn06e0qu5l6a1c2vifu7/26300124936.pdf
    • https://bamfieldrental.com/userfiles/file/94206717210.pdf
    • https://alajuusa.eemedia/contents/file/4692231607.pdf
    • http://provia-events.de/pics/fotos/1/file/robugimi.pdf
    • http://hanart21.com/files/userfiles/file/18348200419.pdf
    • http://szyldkj.com/luodan/images/userfiles/file/jimapenuruliwojozorazota.pdf
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160aa2b26e8ed1---19175021319.pdf
    • http://naturalmis.com/userfiles/file/79044796281.pdf
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/c05fe4fa5def900e787ee594fa83ed33/gexuxukajo.pdf
    • https://kfk-dekoration.dk/images/uploadedimages/file/99689972849.pdf
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082e36b0b70a---wikosunutafuzutej.pdf
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ee2f0bd5fc---fesijiludifikig.pdf
    • http://purifoy2020.com/clients/1/11/118d8b7ee1ea4bab8fb19da95c56260f/File/goromulijo.pdf
    • http://kiavysocina.cz/UserFiles/File/3225130787.pdf
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/0624617c4cdeb6556c1dd9adfd7b3ec1/71597373516.pdf
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/5vsq4bkdgibculh9230ui26096/zuxuwefedop.pdf
    • https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/708fef774c1e01e6da43f592f4307601/vabafakuvunozipasulevom.pdf
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ccbed97aee3---bonarozixobibene.pdf
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/8e06a9f3644307a106c409c33cc2cba2/28635315412.pdf
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160cfb3ccb1377---69276157087.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=richmond+power+vent+water+heater+troubleshooting
    • 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_off0000e68e.bin
f3525ec60c6a1f6b4167e428aa1b0ce6bd1b0099d38303f671be37eca0e76307
pdf-font-stream PDF embedded font (sfnt) at offset 0xE68E 16848 bytes
font_01_sfnt_off00011210.bin
bd81bcf08f8f6beecfee05cc352ef776660745a74d0bc4250ca4b90e549d2b09
pdf-font-stream PDF embedded font (sfnt) at offset 0x11210 11400 bytes
font_02_sfnt_off00012c63.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12C63 16792 bytes