Malicious PDF — malware analysis report

Static analysis result for SHA-256 f55d60f5d492da62…

MALICIOUS

PDF

89.8 KB Created: 2021-07-06 19:55:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 01d9148a7a7300ab3a61a1dcf1733f07 SHA-1: 874205c74448d4abe55657d672772d01e4ff8891 SHA-256: f55d60f5d492da62ddef6468252ed8f226c9892e1355e5cf0befe92f6842c321
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was identified as malicious by ML classifiers and ClamAV, and exhibits characteristics of an advance-fee scam lure. It contains numerous links to PDF files hosted on compromised websites, suggesting a phishing or social engineering campaign. While no scripts were directly extracted, the PDF structure and heuristic firings strongly indicate a malicious intent to deceive users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/jioejbv8p5qoem1p3dfm3a4t5h/19091288024.pdf
    • http://donkaew-furniture.com/ckfinder/userfiles/files/nibidigerufupen.pdf
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/16092f9b463f4a---41364219557.pdf
    • https://alnahamgroup.com/userfiles/file/34840965266.pdf
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b010d411ef5---dotipuvib.pdf
    • http://bwc.lt/i/70428836049.pdf
    • http://aksaxena.com/bpms/includes/fckeditor_uploads/userfiles/file/22561839803.pdf
    • http://appletechsolutions.com/userfiles/file/jovotufopujejafifanel.pdf
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/00b353c86d458681f3d456f706473b90/farowabutukamaxo.pdf
    • https://bienenaktuell.com/sites/bienenaktuell.com/files/file/30963334445.pdf
    • http://noospc.ru/SITE/files/editor/file/zewogiz.pdf
    • http://nousgarage.com/userfiles/file/vawebolisosadokiwokuwo.pdf
    • http://abnicum.com/files/file/vemaxivosa.pdf
    • https://htchninc.com/d/files/beranakejusasuriwomiti.pdf
    • http://agcslohian.com/userfiles/file/26308696977.pdf
    • https://webmenuplus.com/images/file/34820444266.pdf
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/0572862e8a0f74a920fd2e4fa5c4c78b/kejowazugogijozi.pdf
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/160977aeb2b767---fofuwapi.pdf
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160887bf765a8f---95595262158.pdf
    • http://westernmaki.com/uploads/files/15826983539.pdf
    • http://www.thaiboat.net/image/upload/File/sufofilutorodoritelovika.pdf
    • https://marblobathware.com/app/webroot/img/files/sokotibimojusixo.pdf
    • https://avgdesign.com/userfiles/file/71382051476.pdf
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/f37039a3b44aa934678700b57057c3ee/58658695321.pdf
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/16094df7d5b1cb---64156877576.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=romanian+easter+2018
    • 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_off0000fe6a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE6A 16792 bytes
font_01_sfnt_off0001167c.bin
1be937253683fac7b4c7528ee85625f4f92a56f0980dc084d23460e534fa9dbb
pdf-font-stream PDF embedded font (sfnt) at offset 0x1167C 16444 bytes
font_02_sfnt_off0001411a.bin
686355e82bb26b824ac8658116101ce3f6c8039fb47c16dbdc233273f8de5f6d
pdf-font-stream PDF embedded font (sfnt) at offset 0x1411A 10772 bytes