Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad0dc8e032d3ce37…

MALICIOUS

PDF

71.6 KB Created: 2021-09-30 12:26:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: c06123335fac758c894cab3a5aa5f546 SHA-1: 9d6d457f41ca1f3e42b9e3a60871f27a1e6a7f74 SHA-256: ad0dc8e032d3ce37d3905af3240a33c0fcf7728f268074fac70bfc1a6ae020da
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a link farm with numerous URLs, many hosted on compromised or disposable domains, designed to redirect users to potentially malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically points to this tactic, suggesting the document's primary purpose is to drive traffic to these sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9837

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://queure.ru/uplcv?utm_term=view+camera+on+echo+show PDF link annotation
    • http://bhavalaya.org/ckfinder/userfiles/files/sigesi.pdfIn PDF document text
    • http://mwflower.com/upimagesfile///46705106410.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/71072c3e09f49196637eb534e11689a5/18613481439.pdfIn PDF document text
    • https://villatoscana-pi.it/userfiles/file/11025680624.pdfIn PDF document text
    • http://deforma.it/userfiles/files/lamutinifikede.pdfIn PDF document text
    • https://pspgenuine.com/ci/userfiles/files/zatozuxavudawuzejuwowemus.pdfIn PDF document text
    • https://warungmimpishio2.com/contents/files/55600581313.pdfIn PDF document text
    • https://pecintajp.com/contents/files/24440473472.pdfIn PDF document text
    • https://bangprice.com/bangprice.com/beta/cms_image/file/lozalo.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613b3f46b92b6---gaxefaw.pdfIn PDF document text
    • http://tauben-buchmeier.de/kleinberliner-schuetzen/userfiles/files/jamijawikovazejamofub.pdfIn PDF document text
    • http://pusheng168.com/uploadfiles/20210902103512.pdfIn PDF document text
    • http://generaltubi.com/container/ckfiles/files/zapuvebo.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/4iuo5eephhanj50013flaqmpj1/pokinububoxuk.pdfIn PDF document text
    • https://0955205219.jwa.tw/userfiles/files/bunoxesadefowujakofuxu.pdfIn PDF document text
    • http://xn--80aejmo0alc.xn--p1ai/ckfinder/userfiles/files/kobufuvagi.pdfIn PDF document text
    • https://tomorrowhubs.com/upload/users/files/zexinaviwexogiposowuku.pdfIn PDF document text
    • http://sieuthicayxanh.vn/webroot/img/files/malakorikirojosowalele.pdfIn PDF document text
    • https://mahanakhon.pacedev.com/ckupload/files/8520742094.pdfIn PDF document text
    • http://ingenermarket.ru/userfiles/tivemumixe.pdfIn PDF document text
    • http://controldellaves.com/app/webroot/arxius/file/zikina.pdfIn PDF document text
    • https://5974293.pasarantogel.com/contents/files/50120847933.pdfIn PDF document text
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/abf66abd24f14443612dfcb7abd471ea/xepebevamo.pdfIn PDF document text
    • https://nk-sostanj.si/files/file/58651580943.pdfIn PDF document text
    • https://belitour.ir/basefile/belitourir/files/86370997180.pdfIn PDF document text
    • http://bud-drog.pl/userfiles/file/99645328641.pdfIn PDF document text
    • http://mos-craciun-inchiriere.ro/fckfiles/file/tozuzu.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_off0000b4ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4BA 17560 bytes
SHA-256: d8a866d26af19ea64e0260bd295fb9b425c9fe4d987078e9ec77de4138ce7930
font_01_sfnt_off0000e1a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1A4 10408 bytes
SHA-256: 26e798148e1e4077663719ada69c62550e1654e53d0d966d03868571822e644d
font_02_sfnt_off0000f910.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF910 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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