Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc17a1c63aa69f1c…

MALICIOUS

PDF

70.5 KB Created: 2021-06-23 06:53:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 7c917c7ec621498e914027347117a5a0 SHA-1: f737875286de59da16939b49665eaa4de9444592 SHA-256: dc17a1c63aa69f1c937e3e3c33c19ea1e38cbb8dfefffdd1a58945addcbaec5f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms. The document body, though heavily obfuscated, suggests a lure related to a 'Galaxy s3 mini manual', likely intended to trick users into visiting malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, consistent with phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://crewmak.ru/uplcv?utm_term=galaxy+s3+mini+manual PDF link annotation
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160b98ce6c2427---konezexulatetibepero.pdfIn PDF document text
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608786fe8774a---92139904762.pdfIn PDF document text
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/c41e52bdc5ecdb6ee473f4c6e55024b3/12400546450.pdfIn PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/g8djl5i37p23d7rk5gl7m87041/gitilefadoxejip.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078315f48623---37788004641.pdfIn PDF document text
    • https://radmangroup-ye.com/rgfiles/file/52195931177.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/4c106f265156497dadd2975fec33b02c/bopuvuketuxuxigutavip.pdfIn PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a260de4e01f---sinoxinireripubinopavor.pdfIn PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608760633b537---71308695661.pdfIn PDF document text
    • https://electrabicycles.pl/app/webroot/uploads/file/16206186508863.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608a114002598---keduxobexivusuvan.pdfIn PDF document text
    • http://arcdesantmarti.com/biocop/Images/images-editor/file/65778659441.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/c1etvfd2ofu4su98fcichrnk24/40681774745.pdfIn PDF document text
    • http://signexpowholesale.com/project-new/christianbook/upload_images/file/nifidep.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a096247a697---buzobudesa.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/160bf9446b92d5---36046681024.pdfIn PDF document text
    • http://fixafilm.se/userfiles/file/baputekogunuramaduzat.pdfIn PDF document text
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/5db4ef20sv1bs14vu1j4275kbc/napelu.pdfIn PDF document text
    • https://area34.info/wp-content/plugins/super-forms/uploads/php/files/ve8bu6tk8s11tav1o0nks2j8u1/80330532737.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c18d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC18D 3724 bytes
SHA-256: 5f506f96885c68285abb08013964e969243e5a1cdb180af6bb27fe8127c8fd8a
font_01_sfnt_off0000ceca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCECA 5100 bytes
SHA-256: 79cedf476050ac4552101201337e777526e52890861ae317716465967903693d
font_02_sfnt_off0000e020.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE020 15280 bytes
SHA-256: a92add8d25bc8812b6fc39041f09757929285d7b92e6f2e1b63eeefa2e61555a

Open this report in the interactive analyzer, or submit your own file for analysis.