Malicious PDF — malware analysis report

Static analysis result for SHA-256 211d4fb9966e0258…

MALICIOUS

PDF

89.7 KB Created: 2021-07-05 11:55:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 97380499d5d7b6b4bbd3e13672c7cff8 SHA-1: 090f0b222fe49a2525f49d77c57a388c61ed146d SHA-256: 211d4fb9966e025806b149dd52b28ff74de3e0bb2368929930c59c728fe3c45e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and link farms points towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://garglob.ru/uplcv?utm_term=how+to+recover+a+draft+email+in+outlook+that+was+not+saved PDF link annotation
    • http://jkbprivateiti.com/userfiles/file/sifojun.pdfIn PDF document text
    • http://pincailight.com/zk/UploadFile/file/2021061502132873499.pdfIn PDF document text
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/1au4eka2dk2nflrn9tcjvh7ku5/kupimoxeneb.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/2jqi8k2q0n2uokg1r82qhu5h2u/45024732800.pdfIn PDF document text
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/1608151bb5abbb---matabukojanitopilubabawu.pdfIn PDF document text
    • http://aps-mes.com/files/file/34224455701.pdfIn PDF document text
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d3516c5f5d1---55430332027.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e6ded7ef17---zobirimedifare.pdfIn PDF document text
    • http://rford67613.com/clients/a/a2/a20594cba7d6fe247bc87ef9b80620db/File/89510760154.pdfIn PDF document text
    • https://memoservicesrl.it/file/sulokibufujepogabijota.pdfIn PDF document text
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/fe3c4b378353e691c7674cf531a58a57/63150873366.pdfIn PDF document text
    • http://dekoblickfang.de/userfiles/file/34495196878.pdfIn PDF document text
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/0c191753c81aad8b5e89e0e76840a761/22867793684.pdfIn PDF document text
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce951659a3---kapewerexidepujimiwal.pdfIn PDF document text
    • https://evenimentecastel.ro/wp-content/plugins/super-forms/uploads/php/files/gq4fjqb1e5tobiqub1iqk2uo2p/goxavisonarewepefasokod.pdfIn PDF document text
    • http://muzeumostrowiec.pl/obrazy/file/4355360616.pdfIn PDF document text
    • https://mfdesign.hu/files/file/voxatureb.pdfIn PDF document text
    • http://fujiya-la.com/uploads/files/zobar.pdfIn PDF document text
    • http://pokewaveanaheim.com/uploads/files/34173151121.pdfIn PDF document text
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/7k72bimbbgct8pkskr4d1iib5a/kurenimibafakopu.pdfIn PDF document text
    • https://treasurehunterdetectors.com/ckfinder/userfiles/files/repanawusa.pdfIn PDF document text
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/k3sol1otcb9lf3ivhsu519uon6/rodesolusipibituno.pdfIn PDF document text
    • http://maychamsocda.vn/images/userfiles/file/99160142846.pdfIn PDF document text
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/e6de3ea09ad36fe5d2bdccd52be4956c/nixawofoduxigepete.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_off0000fa32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA32 11076 bytes
SHA-256: 2727fdc717576b83e335c8c23c1291bef131867a4848da19860185810621efc7
font_01_sfnt_off000113cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113CF 17212 bytes
SHA-256: 11b66448abaf30fb0c6b1fe6d43fd7fc626f1118880f70e9f023acc688de6509
font_02_sfnt_off00014113.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14113 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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