Malicious PDF — malware analysis report

Static analysis result for SHA-256 3089481533b47379…

MALICIOUS

PDF

87.5 KB Created: 2021-09-02 18:16:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: cd7d85e301b2399309acee8f40400840 SHA-1: 6e4d8c75de182631281f7b5cd427c1f876fa0ce8 SHA-256: 3089481533b47379c94564ab4d6e6206c77880d1b4c9f4123385c95eacd75044
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious content. It functions as a link farm, presenting numerous URLs that point to compromised CMS uploads and disposable hosting domains. The primary purpose appears to be directing users to potentially malicious websites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9765

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://branchennachweis.eu/userfiles/file/79081652597.pdf In PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086a943d05f4---83834048930.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085bf716b13c---34368795413.pdfIn PDF document text
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/r2b9khptsnonh0jup72ncl713o/37033325285.pdfIn PDF document text
    • https://aduanaldelvalle.mx/userfiles/file/83849892735.pdfIn PDF document text
    • https://gencshoworganizasyon.com/upload/ckfinder/files/13608072026.pdfIn PDF document text
    • http://chapelguild.com/images/usr/48492441615.pdfIn PDF document text
    • https://dusunceokulu.net/resimler/files/55209574472.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/61u7ib8h33k6rjf0grl7ek41r7/simininaberubim.pdfIn PDF document text
    • http://tencanpowder.com/d/files/91839803145.pdfIn PDF document text
    • https://www.tratedu.net/ssss2018/assets/143ad273/ckfinder/core/connector/php/upload/userfiles/files/262e4a084cc602b03f7416471e910773.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/9879f701e566dd64951e5e198dc4754a/33428635453.pdfIn PDF document text
    • https://cald-lighting.com/wp-content/plugins/super-forms/uploads/php/files/9a5058a6179544e648433b6c22596d45/46265815858.pdfIn PDF document text
    • https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/50395557da6913d2e578aae526824f70/zinanipof.pdfIn PDF document text
    • https://heritagecambodiatravel.com/userfiles/file/titudategafiligugiput.pdfIn PDF document text
    • https://network-italia.it/file/96538353532.pdfIn PDF document text
    • https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/3d8690f38f0df752066f6e6e9f2e89e2/dirorat.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160d1f20a1bfb2---zusamadur.pdfIn PDF document text
    • https://ladulceseguros.ar/noticias/fckeditor/file/nirurejorawuz.pdfIn PDF document text
    • https://beldaoyun.com/calisma2/files/uploads/11672296553.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/16090eab897549---jarak.pdfIn PDF document text
    • http://pc580.cn/upload_fck/file/2021-7-29/20210729221545767764.pdfIn PDF document text
    • https://tourgardan.com/basefile/tourgardancom/files/kuduxed.pdfIn PDF document text
    • https://rhuyscampingcar.fr/images/files/fevagonu.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160d7954c0ebcf---87515852985.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc18f4a45d---gumopalunoge.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=diversiteit+in+de+samenleving+pdfPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC66 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f47d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF47D 10788 bytes
SHA-256: ab61c8156bf9daeb94fccbc22302acc560f56515b541094ef893c427513c4636
font_02_sfnt_off00010d22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D22 17280 bytes
SHA-256: 7ea5e4273ed4d65045e64117e92c0e866d33337611a8a7072bad216b4de01a5a
font_03_sfnt_off000139ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139FF 16344 bytes
SHA-256: 5cd8a120e106fc2d4fc1855603a636a3ce922decfb1b4d98f17a4a5450337c58

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