Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2b694fe36da66a7…

MALICIOUS

PDF

87.2 KB Created: 2021-07-02 01:52:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e649ccf7f1e1206b371ed0131ae0c85d SHA-1: 18ca272e3b97e76ef2a6fbc4dcea7c32de3f86bb SHA-256: e2b694fe36da66a7c2318ee9e944455e61012700a67fa6f58cce134e81dd6b16
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress uploads and disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://irlanc.ru/uplcv?utm_term=apa+7th+edition+in+text+citation+paraphrasing
    • https://asthasupermarket.com/userfiles/file/fuwanumetimozatowu.pdf
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/b17aa8e30d4f8e76308eb2f2f006fce4/75693765565.pdf
    • http://carriewoodfamily.com/clients/5/5b/5b9f2fb360c4065436fb7fe1267c3612/File/xeradutenut.pdf
    • http://www.klpreschool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f6473e5c95---73542562418.pdf
    • https://tectrongim.com/uploads/files/38174395273.pdf
    • http://xn--aknmedcal-wpbe.com/uploads/file/93366861827.pdf
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ab9db2a2d3a---12134720897.pdf
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075e0ac9f46b---geletobadilape.pdf
    • http://wchs65.org/clients/b/bb/bb65574a37642f7fe3135935df861e67/File/12625336615.pdf
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/a1f702b93e6059265ea6025446ebb5e8/15028184374.pdf
    • http://alarcon-v.com/editor_upload_image/file/62559999852.pdf
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/ac791b930b9ec94d083f826102c75783/fuzasaluso.pdf
    • http://webinaris.biz/ckfinder/userfiles/publics/files/famigifejumedaxa.pdf
    • http://nationshield.ae/userfiles/files/jixagesewumafe.pdf
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606de377c2ec3---51544560720.pdf
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/6a9c1f61d7596793356382972d92fb27/sibuvaput.pdf
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/6611ddf9f27a7ddfb56d39e39539224f/59861115343.pdf
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/57080be5ee8cdf25d9fd994eb62fafe0/momepo.pdf
    • https://porterbrothersltd.com/app/webroot/uploads/2485916917.pdf
    • http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/160867a9b566f2---xofiwisufufadikuxovuwuseb.pdf
    • http://ufnk.fr/app/webroot/files/file/wewuxen.pdf
    • http://banghaija.com/userfiles/file/dubefubufegidanepive.pdf
    • https://wavesmaroochydore.com/wp-content/plugins/super-forms/uploads/php/files/k2iq2hoe61frel9eq9bflj051l/latiwowe.pdf
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/d18f148477513f01ec11a692d584c7bc/bazaxerizixusokofi.pdf
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/v24lvcqrn4nbc2nroepqpfv6h2/labebu.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_off0000ef10.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF10 16792 bytes
font_01_sfnt_off00010727.bin
979f1183058793098278fe73d0767dbcd730873b6834aec4bf948d2434fa14ce
pdf-font-stream PDF embedded font (sfnt) at offset 0x10727 10880 bytes
font_02_sfnt_off00012031.bin
cef0ac34bee0cc7b896769f3106a7f67546d5d039d08b8302375be8e5fb2da1b
pdf-font-stream PDF embedded font (sfnt) at offset 0x12031 17248 bytes