Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dd151c1d1d557ae…

MALICIOUS

PDF

80.3 KB Created: 2021-06-29 12:27:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3cdf5e5fc973d5770cd50c5fe5d7479e SHA-1: e242bce39b934232604afcd0f5e1e1b4e0387a0a SHA-256: 0dd151c1d1d557ae2b3a4810fa139f4ba28dee8da003b8e74a76f612188d8039
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, presenting numerous URLs that likely lead to phishing or malware download sites. The presence of multiple compromised CMS upload links further supports its role in distributing malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607aa1c7bd9db---rudisisesiforujilezexali.pdf
    • http://akinmedical.com/uploads/file/28653917275.pdf
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c982e513601---lagesopanuzafitata.pdf
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a723d884b6d---fewazora.pdf
    • http://alnoorcity.com/userfiles/file/fakefoko.pdf
    • http://mamaskitchenorder.com/uploads/files/65392235605.pdf
    • https://cuisinescartier.ca/upload/editor/file/wosegijetomexenuxeluva.pdf
    • https://bellevuecommunityfoodbank.org/wp-content/plugins/super-forms/uploads/php/files/9995834bcd32db8a0bf1b74e8def0087/72166234216.pdf
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607603e4347b7---dowibuxileduguwuxibolupo.pdf
    • https://uleshuzataruhaz.hu/files/file/91910250040.pdf
    • http://www.klccpa.com/userfiles/file/
    • http://parvazyab.net/basefile/api203/files/dulofoxedunitasubifisixa.pdf
    • https://koetec.com/home/~ptow/public_html/ckfinder/userfiles/files/71750551267.pdf
    • http://houselandia.ru/files/15101775213.pdf
    • https://ferado.vn/userfiles/file/42484441994.pdf
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa2bfc9cc1---32488346573.pdf
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16088ab8420efe---38009005628.pdf
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/irvgfij1c41tcnr7v2eh3iskb3/mibilok.pdf
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/a34fbc79bb1a0a52219f21cfeab134ab/64591807970.pdf
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16085f6e3c7315---44511273277.pdf
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/7e748e9a147a95d79e773c02526f7565/8325886418.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=download+pokemon+moon+3ds+rom
    • 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_off0000d5da.bin
cd46c0b612fd0ae9955d45525a94310020fb2cef2b483d897610a1db6a617d8b
pdf-font-stream PDF embedded font (sfnt) at offset 0xD5DA 17040 bytes
font_01_sfnt_off00010183.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10183 16792 bytes
font_02_sfnt_off0001199a.bin
e536425057c0253ac12ec8d24332662d65b05b7012d3f6645b1a45731568ceeb
pdf-font-stream PDF embedded font (sfnt) at offset 0x1199A 10716 bytes