Malicious PDF — malware analysis report

Static analysis result for SHA-256 0417f55ea1ad8617…

MALICIOUS

PDF

101.1 KB Created: 2021-09-07 23:25:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cafdfae0d51df0691a90e28537ab36f5 SHA-1: d8fa9eaf5f80e7218968d6bd546b36b2bc9b1b06 SHA-256: 0417f55ea1ad8617e57f9548d6c69875415566a0c38531573fb92587cffdf55e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by multiple heuristics as a link farm and a potential phishing or trojan delivery mechanism. The presence of numerous external URIs, many hosted on potentially disposable domains, strongly suggests an attempt to lure users to malicious content. Although no scripts were directly extracted, the PDF structure and URL patterns are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://hoshitorionline.com/uploads/files/zitivemesezorifesafu.pdf
    • https://autoteam.in/ckfinder/userfiles/files/94661925716.pdf
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/16102fb58afe03---xufapinudusuv.pdf
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610d4a1156c85---forejonejawosoxer.pdf
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/cjsnh3k9jpf1tfintpq3jk9nm4/dadewavogap.pdf
    • https://jahanchart.ir/data/files/file/11527047394.pdf
    • http://lawyermo.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/46269221101.pdf
    • https://gym-rectif.fr/ckfinder/userfiles/files/4475584825.pdf
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae2f0e3a3a4---xetoxamugeko.pdf
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/f933488f0f95ba7d68c5e07a06dfec70/7500053180.pdf
    • https://bosingels.nl/ckfinder/userfiles/files/vinugigabogobi.pdf
    • http://palirna-frydek.cz/uploaded/file/65418654749.pdf
    • https://renebeumer.nl/userfiles/file/jujew.pdf
    • http://foto-preiss.at/upload_files/files/gamekikotobidemanisuz.pdf
    • http://moneymaker-gold.de/files/pasifavabitesudetefovamit.pdf
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082c54cc9469---fukepiviboxapatuzalakuso.pdf
    • https://best-label.com/upload/files/wadakufesolotus.pdf
    • http://ytovietnam.net/ckfinder/userfiles/files/parixudibubosot.pdf
    • http://riskhedgetech.com/uploaded/file/99340374160e857c191a27.pdf
    • http://tunesistudio.eu/userfiles/files/59165953812.pdf
    • https://burmesecatclub.nz/wp-content/plugins/super-forms/uploads/php/files/6c6c08acc7d68ba7661551586ea2ed24/83981203596.pdf
    • http://romengo.com/ckfinder/userfiles/files/40144047799.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=vitrified+clay+pipe+engineering+manual
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000120f0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x120F0 16792 bytes
font_01_sfnt_off00013907.bin
35bbc22d5e5afe2ad706ed72d802cf85a414393db29982344266c903b85cae5d
pdf-font-stream PDF embedded font (sfnt) at offset 0x13907 10860 bytes
font_02_sfnt_off000151e5.bin
0202529789ea200f0fb0b94b130bd7b0a0e8dfdb892d3c232c3316a53184bc86
pdf-font-stream PDF embedded font (sfnt) at offset 0x151E5 19476 bytes