Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbe150c46817153a…

MALICIOUS

PDF

80.2 KB Created: 2021-09-12 21:08:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 4650069524027295f2935fe690452a9b SHA-1: 7b89fd1c816528218aa18e6385b38e9e1d31a650 SHA-256: dbe150c46817153a4c4bbe12f981368f3b09d1c42a54936bd4a2192a04345be5
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 hosted on disposable domains or compromised CMS uploads, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://smidgel.ru/uplcv?utm_term=torque+pro+download PDF link annotation
    • https://yourownadviser.com/ckfinder/userfiles/files/pojopama.pdfIn PDF document text
    • http://bftt.marketsearching.com/upload/files/runepovamabizuxe.pdfIn PDF document text
    • http://marcelponjee.nl/ponjeefiles/file/27276417914.pdfIn PDF document text
    • https://wegofa.com/userfiles/file/sitagatikosaxinuwez.pdfIn PDF document text
    • http://niestachow.pl/data/aktualnosci_imgs/file/levivanijubon.pdfIn PDF document text
    • http://garage-fuji.jp/js/upload/files/sujevogavuxozepu.pdfIn PDF document text
    • https://gagiongvitgiong.com/ckfinder/userfiles/files/timoradupili.pdfIn PDF document text
    • http://xn--80aaeiengkwpz6p.xn--p1ai/pub/file/xenevakowozowivurewu.pdfIn PDF document text
    • http://haai.org/upload/file/5539149988.pdfIn PDF document text
    • https://orrizon.ru/images/file/kipeposiri.pdfIn PDF document text
    • http://cu-hinothai.com/ckfinder/userfiles/files/guvotewevunazedejuxinigor.pdfIn PDF document text
    • http://cieplej.pl/imgturysta/file/panijin.pdfIn PDF document text
    • http://xn--h1aaebajlcgx.xn--p1ai/sadm_files/latiporofuxugesokenuri.pdfIn PDF document text
    • https://fototipia.hu/files/files/butofaxera.pdfIn PDF document text
    • http://expertworker.paraleumarian.ro/app/webroot/files/userfiles/files/19840992748.pdfIn PDF document text
    • http://hp-cnc.de/uploads/files/30873329935.pdfIn PDF document text
    • http://hantechwelding.com/userfiles/file/2021090718044373499.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d39566df1a---mesipusimig.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613cd213d13c0---zonofifuwirukubigumufes.pdfIn PDF document text
    • http://espokebar.com/uploads/files/34102254158.pdfIn PDF document text
    • http://weddingdove.tw/uploads/files/202109111749332565.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/f4qeogi2squkssm00csmdeab8b/waben.pdfIn PDF document text
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/mgaal4glnmpfspkaiuea9nudh3/diziriwopofugod.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_off0000d7c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7C1 17088 bytes
SHA-256: 049862d29167f93ce5383b8b66b9e1708a3b2b386365bad7770f8e3355dde17f
font_01_sfnt_off0001046e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1046E 10324 bytes
SHA-256: 00106a6f3f970d7072dab17e1467b3b2f0b333903e34d7ee88cb10da6ff7b460
font_02_sfnt_off00011b9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B9E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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