Malicious PDF — malware analysis report

Static analysis result for SHA-256 325252e5713a045c…

MALICIOUS

PDF

78.3 KB Created: 2021-09-18 21:09:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 59920177de11c5950fcd1d6c2f20f472 SHA-1: 8ea413584c990050f41fb495d7983d48ba802b3c SHA-256: 325252e5713a045c102577de63fd1a77bfe9253217f4fdf30052f08fe6be1fdf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains numerous embedded URLs that point to compromised websites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure indicate an attempt to distribute malware or conduct phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://wastran.ru/uplcv?utm_term=real+ludo+star+apk PDF link annotation
    • http://jcnjl.com/userfiles/files/jukuxib.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613fefe0cd2f2---58690200195.pdfIn PDF document text
    • http://sosnovgeo.ru/userfiles/file/75071309158.pdfIn PDF document text
    • https://autopits-directo.migrupoq.com/ckfinder/userfiles/files/87855924160.pdfIn PDF document text
    • https://nepaltrekkinginhimalaya.com/assets/userfiles/files/82466417511.pdfIn PDF document text
    • https://support-trevianum.nl/userfiles/files/54233634284.pdfIn PDF document text
    • http://galluccifaibano.com/userfiles/file/fazezebaxubedodowar.pdfIn PDF document text
    • https://lesartsdansmonjardin.com/userfiles/file/20210912194225.pdfIn PDF document text
    • https://treasurehunterdetectors.com/ckfinder/userfiles/files/6307083811.pdfIn PDF document text
    • http://patanamachine.com/imgUpload/files/jopupovavutuduza.pdfIn PDF document text
    • http://www.beautyvogue.ch/Files/file/nazak.pdfIn PDF document text
    • http://thegioixedap.net/upload/files/rofulupelumanis.pdfIn PDF document text
    • https://alansglobalservices.com/ckfinder/userfiles/files/79668325703.pdfIn PDF document text
    • https://techielingo.com/fck_uploads/files/jamapesadavag.pdfIn PDF document text
    • http://www.recko.ru/ckfinder/userfiles/files/kaliz.pdfIn PDF document text
    • http://jilienjrubin.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/duwotemoxali.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/6a9b4af69b95d93ce0bb4ca5f099977e/mubovelu.pdfIn PDF document text
    • http://jyjjapan.jp/files/ckeditor/files/39158600060.pdfIn PDF document text
    • http://vuatoyen.com/uploads/userfiles/file/rovuwivewodoxuxebinoge.pdfIn PDF document text
    • http://nextgenship.net/upload/file/20210903163067564742.pdfIn PDF document text
    • http://msslink.ru/userfiles/files/vukojojovomemekegomam.pdfIn PDF document text
    • http://stavclearing.ru/upload/files/31917001967.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/bb2c128fc320bc5235f6140d15a92e26/70871028441.pdfIn PDF document text
    • http://greenearthgardens.org/userfiles/51300652644.pdfIn PDF document text
    • http://fence-alarm.com/userfiles/files/29864989599.pdfIn PDF document text
    • http://ceramvetro.net/userfiles/file/lafalemamirorafitegobip.pdfIn PDF document text
    • 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_off0000cead.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEAD 10428 bytes
SHA-256: fafbc89c47468c08581a75b6c1d131cb2093593cd83f6f0c7808679a51fff2ea
font_01_sfnt_off0000e673.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE673 17452 bytes
SHA-256: 40c2fc11f3abec6424e4623f41caf17936fa2cb5afd63ee92d6f9f27458027a0
font_02_sfnt_off00011374.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11374 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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