Malicious PDF — malware analysis report

Static analysis result for SHA-256 560eb16a07da0101…

MALICIOUS

PDF

67.7 KB Created: 2021-09-20 14:56:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: e56cba78d4d19029ca73c31f717fdbec SHA-1: a194d842cec632637eed19eba8a869aefedb4d8c SHA-256: 560eb16a07da0101a15b371fb604ed0471d2579b30b3c597bdaaa945601f803f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs, many of which point to disposable hosting, suggesting a link farm designed to redirect users to malicious content. No scripts were extracted, but the overall structure and heuristic firings indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 https://catamma.ru/uplcv?utm_term=super+punch+out+download+android PDF link annotation
    • https://szabobuszberles.hu/files/files/julor.pdfIn PDF document text
    • https://websbag.com/uploads/files/lufase.pdfIn PDF document text
    • http://noticiascgnews.com.br/ckfinder/userfiles/files/54579197851.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142f80a6ba5a---witizadigikozezinis.pdfIn PDF document text
    • http://deeringbayrealestate.com/userfiles/files/76437191197.pdfIn PDF document text
    • http://www.medicellbank.com/userfiles/files/55661805087.pdfIn PDF document text
    • http://gyogytornasziget.hu/uploads/files/83169540467.pdfIn PDF document text
    • http://halmar.info/userfiles/file/47043757017.pdfIn PDF document text
    • http://mawratanews.com/armedia/uploads/files/9081703295.pdfIn PDF document text
    • http://xecuoihuyhoang.com/uploads/userfiles/file/59219992523.pdfIn PDF document text
    • https://mmeasar.com/mmeasarfiles/file/94688271870.pdfIn PDF document text
    • http://el-system.jp/uploads/2012/files/26589073199.pdfIn PDF document text
    • http://avtosfera28.ru/userfiles/file/51829640597.pdfIn PDF document text
    • http://star-transform-moscow.ru/uimg/files/34313487301.pdfIn PDF document text
    • https://glycocalyx.nl/userfiles/image/file/68630668161.pdfIn PDF document text
    • https://satellietgroep.nl/userfiles/files/69899415588.pdfIn PDF document text
    • http://1utilaje.ro/mm/file/raregenin.pdfIn PDF document text
    • https://indoshaolinkungfusociety.com/ckfinder/userfiles/files/rumasa.pdfIn PDF document text
    • http://hong-tour.com/FileData/ckfinder/files/20210903_E47FCD37E18AFE9C.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/1587c44e4e0948bb02f282b35130eae8/tozalurudakavab.pdfIn PDF document text
    • https://rumputhijau.com/contents/files/tevoda.pdfIn PDF document text
    • http://peak-experience-europe.com/images/blog/file/neneg.pdfIn PDF document text
    • http://dsacare.com/admin/uploads/file/rakerorelekixikewurimo.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_off0000ac96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC96 10704 bytes
SHA-256: dd8e30e14faf310158cadd6dc25e94ca090bd9eec6ab300a39f7c7fca25d87a2
font_01_sfnt_off0000c520.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC520 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000dd32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD32 14484 bytes
SHA-256: 28d7ba563501cf0e3c3623f20449bfd6e8008c42948b524f5a889ed14ff64104

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