Malicious PDF — malware analysis report

Static analysis result for SHA-256 94fe465430176b8c…

MALICIOUS

PDF

84.8 KB Created: 2021-08-19 23:26:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-18
MD5: 4a96ef31bba523cfad39aab22aae9414 SHA-1: 70388e728a094951bab5ba9667ea32ac79b3995f SHA-256: 94fe465430176b8c4c5e865b63a4203f8d0c22e3bcff71ac3bb96bcc2a03c899
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains a link farm pointing to multiple compromised WordPress sites, which in turn host other PDF files. The presence of numerous external URIs and the link farm structure strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/5b437a42176b49b1bf02b5c979f60ccf/70805435050.pdf In PDF document text
    • http://nordicaluminium.ru/userfiles/file/dororuna.pdfIn PDF document text
    • http://bodemveenweiden.nl/bodem-veenweiden-img/27638516667.pdfIn PDF document text
    • http://bangdinhphucat.com/quangbasanpham/app/webroot/upload/image/files/18264506036.pdfIn PDF document text
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1afcb70c2b---38518692386.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/19563827760.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f732f4c4ec---mitenubefepofowumare.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/g8r2ftuejgpb3c44lj6toiorp8/37032849249.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1609c52a2c4800---85028492346.pdfIn PDF document text
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/0b81pj3aaphu9ha7agh58qds91/melilugodebagezab.pdfIn PDF document text
    • https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/10706e714ed75b1d2ed7610c05dede38/71570096753.pdfIn PDF document text
    • http://westernmaki.com/uploads/files/widinovezexojone.pdfIn PDF document text
    • https://crownprolaw.cn/userfiles/Proj_Name//files/86979631797.pdfIn PDF document text
    • https://gs-hemeringen.de/ablage/userfiles/files/kanizavobiwigeriwew.pdfIn PDF document text
    • http://dallapietamarchisio.it/userfiles/files/12914061536.pdfIn PDF document text
    • http://www.haztartasigepszakuzlet.hu/pics/file/83195386374.pdfIn PDF document text
    • http://chicohigh1987.com/clients/47015/File/14070303562.pdfIn PDF document text
    • https://kalyna.ua/sites/default/files/userfiles/file/wogaw.pdfIn PDF document text
    • http://abwcolley.com/uploads/files/92597663421.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3b23fef203---fimakegewabe.pdfIn PDF document text
    • http://studiophotosfashion.it/userfiles/files/27277469144.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a7e52cacc1e---3369441009.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=que+propiedades+tiene+el+camotePDF 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_off0000e225.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE225 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fa3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA3C 10832 bytes
SHA-256: e51913cdd14393d57c59ee25b21543ee298545b53255e5fa4d9b6d2d573f561f
font_02_sfnt_off00011349.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11349 19112 bytes
SHA-256: 999007d4c3c09fb3b54514bf7a5481a691bad562759ffc4860c999246b155f33

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