Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e04705c88600b4b…

MALICIOUS

PDF

88.7 KB Created: 2021-08-12 15:04:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: b1c77e248ff8ba7ba05c8ad4f7610d57 SHA-1: 1ebda38d658c5ceea2a92e83eb39f501eecad194 SHA-256: 3e04705c88600b4bc61b343d32ef2fc115f0741eb4171016691bb57137483ed5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://letstravelforacause.com/miet/assets/files/bamixapazelinupetupudoviv.pdf In PDF document text
    • https://www.gico.ge/ckfinder/userfiles/files/2903939504.pdfIn PDF document text
    • https://jxlmedu.com/file/files/20210702_180626.pdfIn PDF document text
    • http://winhazel.com/indigo/ckfinder/userfiles/files/10659383061.pdfIn PDF document text
    • http://normel.org/files/upload/file/47869211984.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/156b893d55ea2862b295327103cc29c2/3969968421.pdfIn PDF document text
    • https://bczenekar.hu/files/file/62490062848.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160849189e0925---83581155113.pdfIn PDF document text
    • https://mobistore.co.nz/wp-content/plugins/super-forms/uploads/php/files/ed19d5d155d0285b00aa5deadf135a1c/tipojuwiva.pdfIn PDF document text
    • https://ka-base.no/images_content/file/60071226645.pdfIn PDF document text
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/9vlvs5ltt75jnmmokt4gv2osta/34224611328.pdfIn PDF document text
    • https://atx-stroy.ru/wp-content/plugins/super-forms/uploads/php/files/f99f0646ddcb5b86122fce6ace609e9b/8440030706.pdfIn PDF document text
    • http://veterinariogiardinelli.it/userfiles/files/kajewov.pdfIn PDF document text
    • https://humble-brag.com/wp-content/plugins/super-forms/uploads/php/files/2pj4sr9teaevv5nm91dno95oil/95093079043.pdfIn PDF document text
    • http://inglewoodreunion.com/clients/68690/File/59245574813.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/161128e9ee8e44---vizaxabawabazujibi.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160d569c03b25c---99154341296.pdfIn PDF document text
    • https://arket.io/wp-content/plugins/super-forms/uploads/php/files/rmitpvsevno989mg55n0oenipg/jarazagererosi.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a46dc43ee7d---18336734671.pdfIn PDF document text
    • https://dafelia.com/files/nudexagalebanekosenisuwab.pdfIn PDF document text
    • http://hurtmar.pl/Upload/file/fimajetozowavuj.pdfIn PDF document text
    • http://bensonlandscape.com/editorData/file/71755026890.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075a7c8c4ce0---papeliwivigopo.pdfIn PDF document text
    • http://hengtaixin.com/HangShun/ckfinder/userfiles/files/39070202921.pdfIn PDF document text
    • http://3e-machinery.ru/app/webroot/filesfiles/fuverovuferuku.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=ap+biology+neuron+function+pogil+answersPDF link annotation
    • 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_off0000f762.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF762 16556 bytes
SHA-256: 05c416033aedca0ca36f9b526e53ea7f5a460069b3646f3d91b860259e7f31f2
font_01_sfnt_off000122a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122A8 11076 bytes
SHA-256: c2468c835c1aeec89b525f8be088ba99256f096c314b33d7fa02905217f7bcef
font_02_sfnt_off00013c82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C82 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1