Malicious PDF — malware analysis report

Static analysis result for SHA-256 7092c2001ec6ede1…

MALICIOUS

PDF

87.3 KB Created: 2021-08-09 05:56:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 1bf6be5aebaed4258cb396506f58a645 SHA-1: 672340fac4f6f69c47798691b5e3b6344a47994e SHA-256: 7092c2001ec6ede1dab2c9e11299e03b5878c7ce448c5d17295d4264094dec3e
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains, indicating a link farm for malicious redirection. ClamAV detected this as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. The presence of external URIs and link farms strongly suggests an attempt to direct users to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 7

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://elskup.pl/images/assets/file/5396276655.pdf In PDF document text
    • http://remaining-mc.de/userfiles/file/besogazasefagozuvumiz.pdfIn PDF document text
    • http://csc0731.com/userfiles/file/20210622181057_9ninn9.pdfIn PDF document text
    • http://nokianhakkablue.ru/ckfinder/userfiles/files/50772194070.pdfIn PDF document text
    • http://sgpeo.pl/users//file/bapezifugomigafoxazu.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160af6d87a05ac---76360027546.pdfIn PDF document text
    • https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/3lnqdht6jslbcfd35aod911kc0/1659938161.pdfIn PDF document text
    • http://toyotarent.kr/FileData/ckfinder/files/20210719_58258A64AF7338AB.pdfIn PDF document text
    • http://sgyscom.com/upload_fck/file/2021-7-2/20210702144230397420.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/24924956301.pdfIn PDF document text
    • https://rmp-familienanzeigen.de/cms/files/kelonuporopifis.pdfIn PDF document text
    • https://cplastik.com/data/cms/file/dudon.pdfIn PDF document text
    • https://coonvalleycc.com/userfiles/file/pexazekixev.pdfIn PDF document text
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160cebb1178d73---kigazonapageda.pdfIn PDF document text
    • http://moon-villa123.com/CKEdit/upload/files/resirubotitipamebebapex.pdfIn PDF document text
    • http://ryouhurt.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/soxofopanolal.pdfIn PDF document text
    • https://angkortaxiservice.com/userfiles/file/fanisa.pdfIn PDF document text
    • http://sunjewelsonline.com/userfiles/file/69377299854.pdfIn PDF document text
    • https://lion-trading.co.uk/wp-content/plugins/super-forms/uploads/php/files/5nc8njkgcjs82e507pri4tnr21/xoxejado.pdfIn PDF document text
    • https://polskieplytki.com/wp-content/plugins/super-forms/uploads/php/files/dfe0c7e9a05370edca80e084616f8f11/12162091472.pdfIn PDF document text
    • https://zebcom.in/userfiles/file/67382173204.pdfIn PDF document text
    • https://salubrismd.com/wp-content/plugins/super-forms/uploads/php/files/3eee87df21839ae3f9d8216abeaf3a8e/lobibuwo.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/h6hab0psi3m3be1a44oqh5mnj1/zuzevevuv.pdfIn PDF document text
    • http://classicalgardenornaments.com/uplds/file/84554693741.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=what+themes+does+thank+you+ma%27am+expressPDF 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_off0000f25f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF25F 16740 bytes
SHA-256: 79bad70f4c54289b607b182323bbb8c5e703f5e4f112329e16d2573a76bdd840
font_01_sfnt_off00011d91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D91 10952 bytes
SHA-256: 2c972677685dc394aa803033173bf2872c3047e29afac29adc63912021a26453
font_02_sfnt_off000136ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136EA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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