Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1d7ecdf82701656…

MALICIOUS

PDF

104.3 KB Created: 2021-06-27 02:42:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 001b397c76376bb49890f6257918f742 SHA-1: d5bc016a43c01278b33b07759cd58a81a6a5d99e SHA-256: f1d7ecdf827016567d42c424bdb9c669c76f50640cb30e4b6caaf39d6304b1db
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many pointing to compromised WordPress sites and potentially malicious PDF files. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The document structure suggests it's designed to appear as a legitimate file while acting as a gateway to other malicious resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9934

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.eoluk.com/wp-content/plugins/super-forms/uploads/php/files/8p2tpm6p2n0vb05q71pt0gbtto/medat.pdf
    • https://www.charityweiss.de/wp-content/plugins/formcraft/file-upload/server/content/files/160898c643dfbc---busixuwigife.pdf
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/9laoadgk4087fa0jndpfjbpnd6/powuxalo.pdf
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1609c67e624732---86942629780.pdf
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b38e168420a---80734877269.pdf
    • http://autavrabek.cz/obrazky/file/gowigelup.pdf
    • http://bsp-plovdiv.org/ckfinder/userfiles/files/lumewegagagaxedukutitas.pdf
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f47d895318---xefajumibev.pdf
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6adebbd523---degemifejetefofeferototix.pdf
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/16083004e3de34---82263761889.pdf
    • http://insureatkk.com/ckfinder/userfiles/files/juwumixofubelosuviwagiwi.pdf
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609ea9e0ed0c2---19996212905.pdf
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/2791bedb794d335e576914fa72cc5620/29093914651.pdf
    • http://asfus.net/virgsurv/userfiles/file/4739874031.pdf
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085bebdde530---wuvorobidepudolamogud.pdf
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dbb326cae1---38604703685.pdf
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608ab044f0d02---82725818878.pdf
    • http://polskienarty.pl/data/aktualnosci_imgs/file/dirajowivejepove.pdf
    • https://www.ideaklinikizmir.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081493d6f52e---sanatagozotafa.pdf
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/c2752ddb5991e4f249dfe9119a2818f6/ninapoxilupitekimex.pdf
    • https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/a99df1163441d97f590cfb199080f2c9/dogofipobutepunidaluvaf.pdf
    • https://stijsr.com/userfiles/file/12770176415.pdf
    • http://riceart.ir/basefile/files/70144641509.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=roman+numeral+one+to+hundred
    • 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_off000137ee.bin
6e9a6c502d517fe29d74bf43b57ef2c141985b12966a02fd855b80b736577834		 pdf-font-stream PDF embedded font (sfnt) at offset 0x137EE 10400 bytes
font_01_sfnt_off00014f44.bin
f451c1c7922ffd94c766335572e6887962dec10d7b2070deb061ef44387b948c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14F44 17052 bytes
font_02_sfnt_off00017bfe.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17BFE 16792 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.