Malicious PDF — malware analysis report

Static analysis result for SHA-256 db9410612153854c…

MALICIOUS

PDF

73.5 KB Created: 2021-09-19 03:05:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 113344f2609305e5258c1b2748ce2d99 SHA-1: 1a17b54504ef8d9aacb76eb2362dac22e431d186 SHA-256: db9410612153854c2309387fd2858a9a568be4835292f27a35293e7573145bc1
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs that point to external resources, some of which are hosted on compromised WordPress sites. The primary purpose appears to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 https://samsungvrvklima.com/upload/ckfinder/files/21427660668.pdf
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1614427614ea34---54600421886.pdf
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613d37683f0b8---radulute.pdf
    • http://ewtch.com/upload/files/66458127971.pdf
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b174e73008---62752529803.pdf
    • http://codemessaging.net/ckfinder/userfiles/files/15822693047.pdf
    • http://eaupureinternational.com/userfiles/file/womesimerigox.pdf
    • http://begues.mobi/userfiles/file/tepaf.pdf
    • https://ivanamihic.com/files/fakulebigejokarobeseze.pdf
    • https://coherence.cz/userfiles/file/toradoziderijotavulomape.pdf
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16130b4c088575---rajamivemafojew.pdf
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/b4ab61c2c9cb33c8162827cf2e32a40a/gegeputagibodosilak.pdf
    • http://vizesblokk.hu/files/file/62345994086.pdf
    • https://tutorbolivia.com/userfiles/file/76314854502.pdf
    • http://soeurs-scjboran.fr/soeurs/upload/files/87061634784.pdf
    • https://nazragame.com/calisma2/files/uploads/pazemikoledenosuserip.pdf
    • http://bet-balance.com/userfiles/file/namazolasufadikemipe.pdf
    • http://tachikawa-derma.biz/ckfinder/userfiles/files/zedafeta.pdf
    • http://yingtailong.com/upload/file/210901131237706023ebo8i9b9s4nb.pdf
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/4250cdc78a6d30d40a87f90ffc03f879/62455854210.pdf
    • http://cn-junsheng.com/upload/file///2021917203846058.pdf
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16142a1a778ccf---26552596801.pdf
    • http://mirai-kankyo.com/userfiles/files/resenuvasegobep.pdf
    • http://vigova.com/Images_upload/files/rogoketetam.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=andy+emulator+snapchat
    • 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_off0000bd98.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xBD98 16792 bytes
font_01_sfnt_off0000d5aa.bin
16a1deed7ea0a85292fcb589af43bd3a220d0fc947da9e86cc951896ee0e4f81
pdf-font-stream PDF embedded font (sfnt) at offset 0xD5AA 16480 bytes
font_02_sfnt_off0000ffbc.bin
ece50ce1ef954b1d248f6962c82deee59fa96a0c0ed55af7cb7f58843e31cfdb
pdf-font-stream PDF embedded font (sfnt) at offset 0xFFBC 10884 bytes