Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ed41c149d19585a…

MALICIOUS

PDF

88.2 KB Created: 2021-07-24 13:48:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 194e035fc04d656daeac5d91492b3b9c SHA-1: 3c98e8e43ab84ebc9d52507bf1a3ad26162c4cea SHA-256: 1ed41c149d19585ab501f7b683a8ee773c7cb2cd8a6af80301b34fdc39e18b45
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a link farm pointing to multiple domains, some of which are hosted on compromised WordPress sites, suggesting a phishing or malware distribution campaign. The presence of external URIs and link farm characteristics strongly indicates an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://tsradviseurs.nl/mailing/images/photo/file/75417420045.pdf In PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609092bf21dcc---82180308902.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088b5866e31a---86866373438.pdfIn PDF document text
    • http://beijingxinzhi.com/userfiles/file/20210720231306_75516295.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/fb97139709ccd9cbe0a06468633be661/15339622496.pdfIn PDF document text
    • https://waroproject.com/file/finadenuwetajuwikazusipow.pdfIn PDF document text
    • http://esoftland.com/userfiles/file/64021939641.pdfIn PDF document text
    • https://nolimitscenter.be/peausitive/images/FCKeditor/file/97561837629.pdfIn PDF document text
    • http://biotop-zamosc.pl/userfiles/file/xixupojuregutujugunut.pdfIn PDF document text
    • https://beautyyaurient.com/editor_upload/file/21232419516.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608ecbe86205b---nasum.pdfIn PDF document text
    • https://cleaner.pl/userfiles/file/53309674018.pdfIn PDF document text
    • http://augustaelectricalwork.com/editorData/file/3996389445.pdfIn PDF document text
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609760fbb3d8a---47493660952.pdfIn PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/59c6586d1f58a0620d6b380d024f9dc1/38617159967.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/71069ec90855aa393cadfecbe74cc192/47043038271.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608614700100b---48059207982.pdfIn PDF document text
    • http://steps4cancer.org/clients/a/a7/a78c374070a178914b502abaf3db82b8/File/43708528463.pdfIn PDF document text
    • https://www.profiemg.cz/upload/ck/files/44497096949.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/ou317nrguhj55pt7mt2r0m0q46/35020455543.pdfIn PDF document text
    • https://polskieplytki.com/wp-content/plugins/super-forms/uploads/php/files/b1af2fb9465ad1278d43a429232a078e/mejunufagujarimudoju.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160f205dd45a82---guvekaj.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16088862227a73---dipadoxatiwut.pdfIn PDF document text
    • http://hum-lucknow.org/test/fckeditor/file/vanawisutuvewipixa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=how+to+reset+samsung+aquajet+vrt+washerPDF 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_off0000f449.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF449 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010c60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C60 10936 bytes
SHA-256: 2cd034ee62998c42b5f537ec28e026b043bc7c3c65c445c77866fbc5745ed83b
font_02_sfnt_off0001254f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1254F 17116 bytes
SHA-256: 844b3e2a115336fa4b5e6945c687c64e627ac4359497f5bcb1da3909d4bc94a5

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