Malicious PDF — malware analysis report

Static analysis result for SHA-256 72e7f5e2639532e2…

MALICIOUS

PDF

85.2 KB Created: 2021-09-18 04:41:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 7f8190f94bf747e315d387d848ecea9c SHA-1: 70249418a44badde1bcd4b7714a61cc5209038d8 SHA-256: 72e7f5e2639532e25dd43d551fabe479ac4ecde9d800ed81462382a29b52d924
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to various websites, many of which appear to be compromised or disposable hosting, suggesting a phishing or malware distribution campaign. The presence of link farms and compromised CMS upload links further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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=understanding+the+power+of+praise+by+david+oyedepo+pdf PDF link annotation
    • https://wecareu.net/ckfinder/userfiles/files/19174489888.pdfIn PDF document text
    • https://5udua.com/contents/files/12740738377.pdfIn PDF document text
    • https://cultureresortpokhara.com/assets/userfiles/files/mopaxe.pdfIn PDF document text
    • http://itnetworkconsultingsf.com/helpdesk/app/webroot/img/userfiles/files/15419680605.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/taturodagasogomavesapur.pdfIn PDF document text
    • http://chothuethietbi.info/img/files/zukifemir.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d19004d3fb---lirununabupavopa.pdfIn PDF document text
    • https://okinawa4d.com/contents/files/bevesilawutebolisetoxira.pdfIn PDF document text
    • https://b2bircruise.travflex.com/bot/ckfinder/uf/files/faxuv.pdfIn PDF document text
    • http://gddfboiler.com/uploads/files/wilubitamud.pdfIn PDF document text
    • https://resttour.com/images/userfiles/files/wukobofixudawovori.pdfIn PDF document text
    • http://wo-kop.pl/userfiles/file/sasurojiresipajoxe.pdfIn PDF document text
    • http://bytip.net/filespath/files/20210914000731.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cbc5928eba---54927539089.pdfIn PDF document text
    • https://seedomoretravel.com/files/files/43773010867.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/161437afc83aa0---8546924044.pdfIn PDF document text
    • http://www.neoneofitou.com/ckfinder/userfiles/files/89305403439.pdfIn PDF document text
    • http://tech-in.info/bramy/userfiles/file/fivinomitixorawijenifaxu.pdfIn PDF document text
    • https://unitedpetexpress.unitedreloth.com/ckfinder/userfiles/files/lemimozizojunezid.pdfIn PDF document text
    • https://ijfbacknumber.com/editor_up/982132600.pdfIn PDF document text
    • http://groupementpecheduloir.com/ckfinder/userfiles/files/wafita.pdfIn PDF document text
    • https://toppelletmachine.com/d/files/25830535146.pdfIn PDF document text
    • http://newabel.com/ckfinder/userfiles/files/fewunudurolekutavonifajiv.pdfIn PDF document text
    • http://cottoneauto.it/userfiles/files/nudukanonu.pdfIn PDF document text
    • https://bbpartner.cz/userfiles/file/25795567872.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_off0000e63b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE63B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fe52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE52 11144 bytes
SHA-256: a5c2d9a47fac4a3235b20ce5b49abc77284e04598f475a18a9aa3508e74bbd27
font_02_sfnt_off000117e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117E8 17856 bytes
SHA-256: 6a08054cb6bafe6bc421c545a59d479594d640d1176a4b65379ac7a8f2854ef3

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