Malicious PDF — malware analysis report

Static analysis result for SHA-256 0de1406855810397…

MALICIOUS

PDF

85.7 KB Created: 2021-07-08 04:01:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4ed0dcb50bde6357da60a90adbbc7a84 SHA-1: 69dbb399230d66a4795fbbd5b16deb603890b3ef SHA-256: 0de1406855810397210a3b9e090781af1a0210951ab46f8861b74ebeae8605c3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs pointing to compromised websites and disposable hosting, suggesting it functions as a link farm for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of an attempt to redirect users to malicious content, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

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 https://smidgel.ru/uplcv?utm_term=take+the+key+and+lock+her+up+pdf
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609744ec28117---87483742663.pdf
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/160ab6a1119ba7---xugivepuwanereparewelulef.pdf
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0db04b945c---70239844009.pdf
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160942ece566ef---42391866454.pdf
    • https://clubslotalmatriche.com/calcas/file/jatala.pdf
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d3e7db6d93b---datupixatotejezumaxo.pdf
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/4vtllqtjop2qg2iiam2s5583p3/22933771514.pdf
    • http://zhouzhuank.com/v15/Upload/file/2021630929377745.pdf
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/ab45e0f2e076d0cbda050d52134c2bf2/wosokukerifewotabodunukag.pdf
    • https://topclassgreenery.nl/images/file/loxofojidesilarubumopuno.pdf
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160acce341133d---vigaxiwodoxofofujat.pdf
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/160a95902c0ecf---84535230409.pdf
    • https://www.aserspa.net/wp-content/plugins/super-forms/uploads/php/files/oqu2627rtssa0b9ocoe01uust3/85733581194.pdf
    • http://yangs-ns.com/ckfinder/userfiles/files/20210530082440.pdf
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608eb75b03cea---22312020374.pdf
    • https://realestateconnect.biz/wp-content/plugins/super-forms/uploads/php/files/munm1dpa9m40eueq8c9id52075/79530994170.pdf
    • http://palyavalaszto.hu/teszt/upload/file/5874220316.pdf
    • http://www.alexgis.com/siteuploads/editorimg/file/wavidimobalixaluxisuvoxi.pdf
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/dff2cf38856cf9e45c004ff1a8dac3e1/12577841295.pdf
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/k5pmjea6ps2du4j0mk3fb2j3u9/93234470835.pdf
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160bacfa095c9b---82037335437.pdf
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb9cc3bea2---gaxobika.pdf
    • http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/uqdr9jh6o0rsacpfsc4akc3466/jaberovixisitesem.pdf
    • http://www.urbanwaterways.info/files/82907127857.pdf
    • https://wlao.on.ca/wp-content/plugins/super-forms/uploads/php/files/fe8a65248f4af5f5418f1aa51a41cfd0/57770015889.pdf
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160950737824e6---94300448707.pdf
    • https://ngusacdon.com/upload/files/nevonakezefoxez.pdf
    • 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_off0000e9c1.bin
ec760929410d73c4b1e63c63e1b1c9e311c7199d906f195af7867693fa9814fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE9C1 18008 bytes
font_01_sfnt_off000118c8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x118C8 16792 bytes
font_02_sfnt_off000130df.bin
7525b0e04107e2e4c92042570ca4518bd538b017711e7ee8afd69c56850ed1b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x130DF 10728 bytes

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