Malicious PDF — malware analysis report

Static analysis result for SHA-256 f04e051adfdb034f…

MALICIOUS

PDF

85.1 KB Created: 2021-06-26 13:22:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6756d7a445d446aba98af72dfb12587b SHA-1: 345849631cccd9669df4f6a3c4894e5cb856c464 SHA-256: f04e051adfdb034f87fdc48309e3c097d30efc3148371510222c113e4e0f96a3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV. It functions as a link farm, directing users to multiple external URLs, some of which are hosted on compromised WordPress upload directories. The primary purpose appears to be to lure users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 6

  • 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.
  • 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://sieuthikhoacaocap.vn/upload/files/silovafumadajigazixa.pdf
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16089a6634ea76---gopitoziwifetit.pdf
    • http://cnpair.com/userfiles/file/dojapufiwalelimekig.pdf
    • http://koopmankennedyfeller.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/dorajedinijopefej.pdf
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/c792fb7428fd7b30b18c3f097b897ea0/jijemodizoju.pdf
    • https://www.prestigeautobody.com.au/wp-content/plugins/super-forms/uploads/php/files/8e70dd0f7881a045e1a979b7fc8898ab/jafeximavomiragulobijese.pdf
    • https://vaytieudungtragop.com.vn/wp-content/plugins/super-forms/uploads/php/files/7re2ncumhb1h6mmj6rri64nvkn/58500092615.pdf
    • http://emilygrilltogo.com/uploads/files/xefawazeliporugezonuvu.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ce58acc6e43---79870193589.pdf
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160c1429fce0e9---vudigelawilasodixu.pdf
    • https://bilbox.es/wp-content/plugins/super-forms/uploads/php/files/2d4d85403e215b972aa3b11ca4924ae9/fobolejudeledatuzepemuge.pdf
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/7c4e7dd1af6a11d64148a94f5c5b4614/20456537566.pdf
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/c5c61db5a11e1f670502be493a1883b0/nesigagedaguvig.pdf
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfc63db5367---52427101650.pdf
    • http://benardoutlite.com/admin/fckeditor/fckdata/file/4276264210.pdf
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f9b0e2c9bf---gotunenasikabagal.pdf
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa136653c73---jojunegubakaz.pdf
    • http://dental-forum.ru/userfiles/file/22533382529.pdf
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a52869cfc87---pukofo.pdf
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b9d73cbb7c2---8141851131.pdf
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/160a227463fc20---49589877634.pdf
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b6c6c014038---butorivawixided.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=how+to+recover+deleted+text+messages+on+android+without+app
    • 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_off0000e7df.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE7DF 16792 bytes
font_01_sfnt_off0000fff6.bin
3eea820584e3bc80c669bfff1bb9a4d5b832b6a5c998781a096729cd370ed0e8
pdf-font-stream PDF embedded font (sfnt) at offset 0xFFF6 11308 bytes
font_02_sfnt_off00011a23.bin
2beb0eef6ba44fcd7e8d98cd4c0159c1a96681dbec78df8b4fe3a76df1714aab
pdf-font-stream PDF embedded font (sfnt) at offset 0x11A23 17136 bytes