Malicious PDF — malware analysis report

Static analysis result for SHA-256 89f627f13db084da…

MALICIOUS

PDF

82.1 KB Created: 2021-09-14 06:08:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 39c4cc52602cbe4b0bd2ffa66d8fd357 SHA-1: 556281c08962b54d01fe9d4d5c7564f51def0a39 SHA-256: 89f627f13db084dacbfe5fb32b3f1fa769d78fdb6da2b2e18da9885f6041d466
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable domains, suggesting a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and URL patterns are consistent with a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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 http://robertoantoniz.com/resources/original/file/77137381385.pdf In PDF document text
    • http://mamolenasnc.it/userfiles/files/wosep.pdfIn PDF document text
    • http://toyotarent.kr/FileData/ckfinder/files/20210909_B512584548BEAF6A.pdfIn PDF document text
    • http://patanjali.zohukum.com/ckfinder/userfiles/files/79725124461.pdfIn PDF document text
    • http://abwninemile.com/uploads/files/73480952099.pdfIn PDF document text
    • http://winteringlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/pufexamupogasepixafivovaj.pdfIn PDF document text
    • http://gwardiajuvenia.pl/zdjecia/fck/file/46263295475.pdfIn PDF document text
    • http://dalnoboy.net/data/filestorage/upload/files/fogogujajixapunatezag.pdfIn PDF document text
    • https://pellevah.com/upload/files/35232205377.pdfIn PDF document text
    • http://xn--b1adbbbaeqjtsflbfms0e.xn--p1ai/pict/file/gamosid.pdfIn PDF document text
    • http://baigeleather.com/userfiles/file/41747812259.pdfIn PDF document text
    • http://leskovec.eu/files/file/binugesuvelodifapuzif.pdfIn PDF document text
    • http://baracenter.be/userfiles/file/94350715337.pdfIn PDF document text
    • http://www.ih-consultant.com/ckfinder/userfiles/files/83329937368.pdfIn PDF document text
    • http://www.hz-kontejnery.cz/ckfinder/userfiles/files/rafafijazon.pdfIn PDF document text
    • http://xn--e1aazeoc7d.xn--p1ai/images/shared/file/22520375261.pdfIn PDF document text
    • http://heizler.hu/files/file/sakekubomifotigumuzod.pdfIn PDF document text
    • https://best-of-geldanlagen.de/userfiles/file/jibamanubiramotafin.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/9f07fcc23ac17c210b8d9c5a55fb5e19/fenogizulonivun.pdfIn PDF document text
    • https://duhocblueocean.vn/ckfinder/userfiles/files/2446368200.pdfIn PDF document text
    • http://immobilier-valence-agen.com/userfiles/file/mologaz.pdfIn PDF document text
    • https://linkevicius.com/upload/galery/file/josemuxepibudisuzunemib.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137a097bab31---witowumifazefalupizofas.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=android+vs+iphone+battery+lifePDF 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_off0000d984.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD984 10896 bytes
SHA-256: 82d45d0d0dc19bb2eba5dce99f3a02526adb723177da854ed51502b423a349e5
font_01_sfnt_off0000f27e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF27E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010a90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A90 18624 bytes
SHA-256: 7396c95fb846ba1546bf17d863af1508c52f6dc9c57c92abc9a9ae0a1ca5dbc1

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