Malicious PDF — malware analysis report

Static analysis result for SHA-256 f69d9d54122db349…

MALICIOUS

PDF

89.4 KB Created: 2021-09-20 07:03:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 73c9c85cca23e1d241a32c9b58977e3a SHA-1: b35f7c52321c2c1c876b95b0635bd834ae39e0a0 SHA-256: f69d9d54122db34980d50b93256295897078e4aa9ddbe53e7763efd7f84319b2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains a link farm with numerous URLs, several of which point to compromised CMS uploads or disposable hosting, indicating an attempt to distribute malicious content or phish for information. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 http://mitcostruttori.it/userfiles/files/79888763057.pdf In PDF document text
    • http://xn--80aafbanafwvcftiqfecrg2a.xn--p1ai/pict/file/42241382076.pdfIn PDF document text
    • http://bloodfaces.de/attachment/file/95284084048.pdfIn PDF document text
    • https://dzido.pl/userfiles/file/69203372513.pdfIn PDF document text
    • https://pacantioquia.org/aym_image/files/fatoziza.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/161410dd425084---43277254772.pdfIn PDF document text
    • https://saintarseny.ca/sites/saintarseny.ca/files/file/fifid.pdfIn PDF document text
    • https://soudureornementalelauziere.com/upload/editor/file/49901607274.pdfIn PDF document text
    • http://ck-kutnahora.cz/gais/image/file/19743435780.pdfIn PDF document text
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/a71bc8b6f8fff5ce0db99af1eb255765/metupinorepemof.pdfIn PDF document text
    • http://www.slappedtogether.com/editoruploadfiles/file/luwamukoxaz.pdfIn PDF document text
    • http://precisionsurgicalworks.com/alpha/ckfinder/userfiles/files/10546730788.pdfIn PDF document text
    • http://dreamwith.gni.kr/ckupload/files/84769037521.pdfIn PDF document text
    • https://sklepbonus.eu/userfiles/file/14736144011.pdfIn PDF document text
    • https://inprovitmexico.com/ckfinder/userfiles/files/35036756361.pdfIn PDF document text
    • https://ilexgold.com/app/webroot/files/userfiles/files/garovu.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/1612f79aeda587---rivosukakojigapo.pdfIn PDF document text
    • https://thehideawayresortpattaya.com/userfiles/files/dawugetofubodesejeli.pdfIn PDF document text
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/161432505ad979---xisos.pdfIn PDF document text
    • https://sagarexpress.com/userfiles/file/81393210510.pdfIn PDF document text
    • http://www.pattyn360.com/upload/forum/files/jepegak.pdfIn PDF document text
    • http://ladyqueen.it/userfiles/files/37275018522.pdfIn PDF document text
    • http://aygroupmuh.com/image/files/33402021777.pdfIn PDF document text
    • https://eravukappalpalli.com/userfiles/file/87988301394.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=captain+america+civil+war+full+movie+in+tamilPDF 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_off0000f7e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7E2 10756 bytes
SHA-256: 8a8f6e03028e956bd91cb1cd76c33c8eeb180d4d5371fed277a7c24e30ab4507
font_01_sfnt_off000110ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110AE 18136 bytes
SHA-256: a70f2505b8fb3198ac2be5d598c8894f3c73f3829048631430b6536c5f360acc
font_02_sfnt_off00013f7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F7B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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