Malicious PDF — malware analysis report

Static analysis result for SHA-256 d68242ea911f042f…

MALICIOUS

PDF

96.6 KB Created: 2021-06-28 09:43:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7737cdebe74594552f8603b280f5a89c SHA-1: bed4d29276c8c989e30c995c81acaf20edc4b995 SHA-256: d68242ea911f042f5dd54ca8821d3e1913148dff32892d9a94ec69c04b8aace6
176 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The heuristics indicate it contains a link farm and attempts to lure the user to enable content, a common tactic for macro-enabled malware. While no scripts were directly extracted, the presence of embedded URLs and the overall detection suggest it likely downloads and executes a second-stage payload, potentially leveraging JavaScript for execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9820

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.
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • 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://drafthe.ru/uplcv?utm_term=convert+multiple+pdf+pages+to+one+excel+sheet
    • https://auto-rujo.com/images-editor/file/47820190844.pdf
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/eiib9sgei0ad2ma00rsrlmgeqt/96111584852.pdf
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608897e531ed7---87511948115.pdf
    • https://riolospettacoli.it/filesUploads/file/70179061332.pdf
    • http://wildpflanzen-planung.de/file/71516503419.pdf
    • http://faxik.ru/ckfinder/userfiles/files/werozazogubuwovirozumif.pdf
    • https://thehideawayresortpattaya.com/userfiles/files/39117334331.pdf
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/0bf6a9472db301937a355ca2d76fdf89/34452787326.pdf
    • http://taiwanglassgroup.cn/userfiles/file/gemuluvoj.pdf
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/d50e4282b782047b9d35b52ca58ec915/95482260069.pdf
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/a42c238cbba6245cfb082487e92a96d8/wupezenurase.pdf
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aaa0730b9d3---reralaxekuxesoras.pdf
    • https://e-fasteners.eu/media/file/68011795414.pdf
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160743581a4cea---23161714305.pdf
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/2mmqqeseqmj5dqfiboaau9msj6/49392763811.pdf
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ccdcd512ff6---102856375.pdf
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087e97e11e89---80172081630.pdf
    • http://9meclinic.com/ckfinder/userfiles/files/67932355167.pdf
    • https://atrax.hr/files/wopokaluvilelo.pdf
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/c349ba9f2680e63a1a25bff6e9761ef2/76691308981.pdf
    • http://caffepontoni.com/uploads/file/notoramozotufi.pdf
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/f575fba26d5c6459e0fb29ceac381a10/39039415374.pdf
    • https://advik.net/userfiles/file/57034634030.pdf
    • http://www.klpreschool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cc04c74296---dafadilefilefuwatajulol.pdf
    • https://realestateconnect.pro/wp-content/plugins/super-forms/uploads/php/files/84a6v1pvkqc0l2pomap7679n07/81272078232.pdf
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/1vj4qcup8s40taj9kohjr25297/35910989216.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_off0001154d.bin
e52f02c50a7837d85d207fd2c11ecdde5a41b8508bf831a3212b77bbde968f4d
pdf-font-stream PDF embedded font (sfnt) at offset 0x1154D 17292 bytes
font_01_sfnt_off00014218.bin
e51e64f0fbeee471bfd3866bb55c77acaf3b046a8d103eab207fe052b05f4c9f
pdf-font-stream PDF embedded font (sfnt) at offset 0x14218 11368 bytes
font_02_sfnt_off00015c8a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x15C8A 16792 bytes