Malicious PDF — malware analysis report

Static analysis result for SHA-256 17f7c9dfb1cd0da9…

MALICIOUS

PDF

85.2 KB Created: 2021-09-21 13:55:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 29daa26ff8b079f234169c1a7f94b93f SHA-1: 8ee44998ba8e78a67bba4343d460ed9c6543967f SHA-256: 17f7c9dfb1cd0da9248d60f697a4ee308dcda3fb89062bc5ecd7a158321bbe19
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF that contains numerous external links, many of which point to disposable hosting or compromised CMS upload storage, suggesting a link farm for phishing or malware distribution. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to open a password-protected archive, a common tactic to bypass gateway security. ClamAV also detected this file as 'Pdf.Phishing.Trojan'. No scripts were extracted, but the overall pattern suggests a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://huntic.ru/uplcv?utm_term=wpa2+crack+tool PDF link annotation
    • https://xebecdesign.com/xebec/userfiles/file/gikinuzefosupumi.pdfIn PDF document text
    • https://cpsguffanti.com/uploads/file/84313055754.pdfIn PDF document text
    • http://emons-verlag.net/testarea/cwsCMSlight/media/files/59346317102.pdfIn PDF document text
    • http://mmbc.cz/_data/user_files/file/veloxofowa.pdfIn PDF document text
    • http://yokohama-model.com/userfiles/files/89815576179.pdfIn PDF document text
    • http://biosafety.biz/ckfinder/userfiles/files/764795967.pdfIn PDF document text
    • http://powercleanperu.com/cms_powerclean_2015/sgi_userfiles/userfiles/files/215303853.pdfIn PDF document text
    • https://tasleemdubai.com/userfiles/files/54724066002.pdfIn PDF document text
    • http://cpgny.com/userfiles/files/mofitiwor.pdfIn PDF document text
    • http://jiendurancecoaching.com/ckfinder/userfiles/files/liwoxonufanegipijexadi.pdfIn PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/eb8648bdd53779f00259bf73372db469/kavamovadeposubijaxilu.pdfIn PDF document text
    • http://z500.si/files/74774346570.pdfIn PDF document text
    • http://bharatandcompany.in/ckfinder/userfiles/files/wefulibomoladefezokusaku.pdfIn PDF document text
    • https://bank-kredit.at/ckfinder/userfiles/files/25377704670.pdfIn PDF document text
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/b2c878af6057ccd518b71f7f3c70e60e/josorosabepim.pdfIn PDF document text
    • http://interface-referencement.com/userfiles/file/55918361588.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1612eb7c6a812c---bavojibevisifupibaj.pdfIn PDF document text
    • http://siblom.ru/files/upload/file/12131308260.pdfIn PDF document text
    • https://santa.my/images/users/00000000/files/rokomugigerivubolokaf.pdfIn PDF document text
    • http://ufcnagykanizsa.hu/userfiles/file/tojedowuzibulofunagiwet.pdfIn PDF document text
    • http://maurovalleferroarchitetto.eu/userfiles/files/zidutetogegarakar.pdfIn PDF document text
    • https://alamansyria.com/userfiles/file/72123262484.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8FD 10076 bytes
SHA-256: 77facf94857efd78f90919c6623a2d0ff87ab9c9b89bf25e9bbb6ec78ed19642
font_01_sfnt_off0000ffb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFB1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000117c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117C3 18132 bytes
SHA-256: ad7af5149be572dc18af1c23a47ccb5427903cf54138f15b7a4f45952ec15126

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