Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d4717b795d01b69…

MALICIOUS

PDF

83.5 KB Created: 2021-06-27 16:49:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4efef22ad99dd1f6759c981136137b4b SHA-1: 931ca6dd3695fdee71f42ae20e31c97e37be8589 SHA-256: 1d4717b795d01b69a3875dd18e74fe784958ae9e131f751a7427aa256d2aec24
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document's structure and embedded links suggest it functions as a link farm, potentially leading to malicious content or further exploitation. The 'SE_CALLBACK_LURE' heuristic indicates the document's content is designed to trick the user into calling a phone number, a common tactic in phishing and tech-support scams.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/74f3b076c141de8bd50a6a0436b6c8dd/jarokoturelu.pdf
    • https://panegovernance.com/ourprojects/chowki/UserFiles/file/96416528216.pdf
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/160890f97db824---33712116782.pdf
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1609a96fe1d957---talezetejenas.pdf
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/16096edf3cd62f---90413192851.pdf
    • https://faprosid.com/file/67510496724.pdf
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d37e957abeb---vobavomolumekufolajanus.pdf
    • http://duocmyphamcongty.com/app/webroot/uploads/files/kifebawapuxi.pdf
    • http://bandenplaats.nl/cmsimages/file/46815796391.pdf
    • http://drwatsonsr.com/clients/2/2b/2b9a0cf27321ceab3a47fbd10bf94d34/File/21817465088.pdf
    • http://artospace.com/pics/file/fagos.pdf
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607524a39dcbb---jupok.pdf
    • http://parentini.it/userfiles/files/xasamefemexufawaz.pdf
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c0411dbdb26---58975607370.pdf
    • http://xtra360.net/campannas/file/piberosomuxukar.pdf
    • https://creteotels.gr/FCKeditor/userimages/file/tirawifo.pdf
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/flmbft98ue28maisdtgbgnd4k1/ruxupesidososuxif.pdf
    • http://leebyunghun.kr/new/upload/board/files/68862703937.pdf
    • http://gentlemensquartersbarbershop.com/wp-content/plugins/super-forms/uploads/php/files/be85afcca41f485a98d34937cc3a0c8c/86556449018.pdf
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bff39058812---20739677218.pdf
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e15bc430fb---96039297266.pdf
    • https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/4jimli3c3o374o27pfv6vi51gj/50400631689.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=gift+of+dreams
    • 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_off0000e3d6.bin
dbd234c656e036b2964bf829763a06e632a397d1579787126f47aa09424a830b
pdf-font-stream PDF embedded font (sfnt) at offset 0xE3D6 17476 bytes
font_01_sfnt_off00011181.bin
83ee54086a0adfcffcb19febfd2d962372d935ef591b428c274dffdec787d5c6
pdf-font-stream PDF embedded font (sfnt) at offset 0x11181 10404 bytes
font_02_sfnt_off00012925.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12925 16792 bytes