Malicious PDF — malware analysis report

Static analysis result for SHA-256 17c1dfab22d8fdc6…

MALICIOUS

PDF

74.0 KB Created: 2021-09-20 00:08:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 8e6a8f509c9d72c9a63c3fac5a22037a SHA-1: 56ed44b5798b1065cb81aa118a25a80047148118 SHA-256: 17c1dfab22d8fdc6d73e17619ff30235b8f85c6365dec76c585b6c4e7226c4da
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which are part of link farms hosted on potentially compromised or disposable domains. The presence of ML and ClamAV detections, along with the heuristic identifying a link farm pointing to compromised CMS upload storage, strongly suggests a malicious intent to distribute further payloads or conduct phishing. The embedded JavaScript is likely used to facilitate the redirection or execution of malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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=download+pubg+app PDF link annotation
    • http://fipjp.com/userfiles/file/61199080322.pdfIn PDF document text
    • https://kit-veron.my/ckfinder/userfiles/files/mowubapa.pdfIn PDF document text
    • https://apaman.ti-am.jp/js/ckfinder/userfiles/files/32394876533.pdfIn PDF document text
    • http://kkagro.com/media/images/upload/file/7641557329.pdfIn PDF document text
    • http://maxgear.cz/webpagebuilder/ckfinder/userfiles/files/lubexafefuzejor.pdfIn PDF document text
    • http://lt101shop.com/userfiles/files/51807318343.pdfIn PDF document text
    • https://civilkontroll.hu/uploads/file/zaxutujupiniwukojidij.pdfIn PDF document text
    • http://fteq.ru/files/file/89841245265.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/161374aca9a13d---46822166698.pdfIn PDF document text
    • https://rowsontw.com/shopadmin/upload/files/vakuravodumigixe.pdfIn PDF document text
    • http://covina.crazyrockinsushi.com/uploads/files/29472703154.pdfIn PDF document text
    • https://www.privathospitaletkollund.com/ckfinder/userfiles/files/visepanonorazanonifuwuvuf.pdfIn PDF document text
    • https://beldapromosyon.com/calisma2/files/uploads/28799078114.pdfIn PDF document text
    • http://7m-shop.com/userfiles/file/7862744142.pdfIn PDF document text
    • http://galettedesrois.eu/userfiles/file/jasotavujoxo.pdfIn PDF document text
    • http://ranjitabiswas.com/userfiles/files/wadigisutifumiligur.pdfIn PDF document text
    • http://komodovo.ru/upload_picture/69989060776.pdfIn PDF document text
    • http://masan315.net/board/imagefile/file/nodibisutiwedazeno.pdfIn PDF document text
    • http://anindecor.pl/files/file/25857961044.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/6c6c914d81e98497056eafbbd7a7b31c/89726271201.pdfIn PDF document text
    • http://fszhenjia.com/upfolder/e/files/20210918114515.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f1e80e331d---53820471084.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16138f882a082a---74272438540.pdfIn PDF document text
    • http://goldenpeak.it/userfiles/files/35137492518.pdfIn PDF document text
    • https://olterus.com/contents/files/motovudoniv.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_off0000c215.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC215 16288 bytes
SHA-256: f9efd00ba0615c860a3493597c227e8c566eeaeaf2b1bc5ce0be50d628cc0442
font_01_sfnt_off0000ebc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBC7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000103de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103DE 10304 bytes
SHA-256: bb21b7d6f1bdfad5a368a9af01fd4cc4e8d028b70c07817fe260a67eb0ebd4a6

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