Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5fe7fd4286a5983…

MALICIOUS

PDF

86.0 KB Created: 2021-09-06 22:34:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 12b76cfbb248a50f26786e77f2d73630 SHA-1: f8b67d0525e1d11cf539fea47ef2a8a3b09dff24 SHA-256: d5fe7fd4286a5983a5097a56cdb782c4b23e51102117db0802c352755faffbe9
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous compromised websites, indicating an attempt to lure users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://avsa.org/sites/default/files/images/files/puxutikokosalewolowuke.pdf In PDF document text
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/a81213b8f2e3904f63a7615db107b896/91331495955.pdfIn PDF document text
    • https://riondene.ch/img/uploads/file/lomofomasosagebafozadadu.pdfIn PDF document text
    • http://mlight.cz/archiv/file/12766359968.pdfIn PDF document text
    • https://laplacedesstores.com/upload/file/vuzozeliba.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/160c9ec051b1b1---34024130033.pdfIn PDF document text
    • http://buergerforum-tirol.at/file/98095815866.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/79ea9eec63d3da15d560c32d39ee0a8d/7964637604.pdfIn PDF document text
    • http://boxethai38.com/upload/file/texulilitemikilorutejalof.pdfIn PDF document text
    • https://www.dartmusicfestival.co.uk/wp-content/plugins/super-forms/uploads/php/files/a50cb66a1c7e581bcf7a7b2bf1a88619/49742423103.pdfIn PDF document text
    • http://www.motionmantra.com/userfiles/files/mojenabaxaxuleju.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b59a54efb33---36620324807.pdfIn PDF document text
    • http://giovanninociti.com/userfiles/files/xejalarewiduwus.pdfIn PDF document text
    • https://addsfly.com/userfiles/file/57721252641.pdfIn PDF document text
    • http://luatsutiengtrung.com/app/webroot/uploads/files/45766043554.pdfIn PDF document text
    • http://jan-fotografie.nl/upload/files/ralivowobodu.pdfIn PDF document text
    • http://birdwatching.sk/media/file/wusafiduropor.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a3ff549a235---pesudofonazepixuxavadit.pdfIn PDF document text
    • http://clubsahdianagalati.ro/upload/editor/file/tamozawamawutel.pdfIn PDF document text
    • http://xatrbio.com/userfiles/file/37586559962.pdfIn PDF document text
    • http://baigeleather.com/userfiles/file/nuvitofapefefafebekakun.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1609df1fb90772---lupuwewovomukubov.pdfIn PDF document text
    • http://chono.mn/uploads/userfiles/files/zogabuzafajaxaforurobevod.pdfIn PDF document text
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/81c8fb7ad59e7de2373037020fd3efcd/51795723501.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=outlook+2016+crashes+when+opening+pdf+attachmentsPDF 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_off0000eb6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB6E 16440 bytes
SHA-256: 14a2ce1bca81f4d77299fe0366e11ad3252994887b0cc572e04d63d07377f99a
font_01_sfnt_off000115ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115EE 11832 bytes
SHA-256: 5197c05073ed28d275d4b72a7cea1cf80e9df3207f3608f31391997a6d25c9ce
font_02_sfnt_off00013209.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13209 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1