Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d009d95a8978d68…

MALICIOUS

PDF

84.3 KB Created: 2021-09-05 20:57:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 14b040e6982c60291a983c07b57f20b6 SHA-1: 1e345aa765a0cbe45e68b6cb2fc3fb4f92f70866 SHA-256: 7d009d95a8978d6871009a76abb727222baa287de20d73a1d9cca509d7ed53cd
156 Risk Score

Malware Insights

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

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous links pointing to compromised WordPress sites, suggesting a phishing or malware distribution scheme. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of link farms on potentially compromised CMS uploads indicates a malicious intent to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/88a8a232a2ca2e528a3829ae6d61e3d2/38183953380.pdf In PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce7b2b7346f---wivirumuxa.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160dbe9b0dae52---gozagalikubitoxok.pdfIn PDF document text
    • https://kaptenhoki.com/contents//files/dibij.pdfIn PDF document text
    • https://masihpt1.com/contents//files/57104626504.pdfIn PDF document text
    • https://fontan-montag.ru/img/upload/kimeteripiwemuzivu.pdfIn PDF document text
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160acb170955f9---9569250375.pdfIn PDF document text
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/7d211ce539937b9462e58c71b6c481c8/89826447826.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/273k8a2h4d1q1m1g30g6p0mjkj/26969157208.pdfIn PDF document text
    • http://cleangroupbd.com/ck/upload/files/gubuwazixexemeti.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/6f0ba54c6b340323692a1d9554190b89/jikuzifipimelari.pdfIn PDF document text
    • https://profesa.net/userFilesfile/50862225870.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce94c24cf10---62800575545.pdfIn PDF document text
    • https://history.tlshaa.org.tw/ckfinder/userfiles/files/vodujixojipog.pdfIn PDF document text
    • http://nirmalapublicschoolerumely.com/userfiles/file/vetonobekinutadadoserig.pdfIn PDF document text
    • http://rolmech-strzelno.pl/Upload/file/nudirer.pdfIn PDF document text
    • http://gospelinamerica.com/clients/874377/File/derasotudivemoxominerez.pdfIn PDF document text
    • https://lawina-radom.pl/files/file/wajewezizejatejofavazunok.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609deb5eea564---rakadonulasuvimew.pdfIn PDF document text
    • http://sattamatkapatti.com/userfiles/file/figiv.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081727c25de7---nanojutimiwagidugoweb.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/e91375aa139bd815c4731b2762550fc8/valojakiteliz.pdfIn PDF document text
    • http://schooldistrictservices.com/clients/f/f6/f6ab1571d2cdf5e569af7b76e288b17c/File/21186450165.pdfIn PDF document text
    • http://studiotravenzolo.it/userfiles/files/wasag.pdfIn PDF document text
    • http://studioriggio.it/userfiles/files/latomipudesuximejurixowo.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a0e233a9fa---pagomete.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/50930565702.pdfIn PDF document text
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/4c6f93822e3ee31b646e0adacb25eca2/mafuguxajoterawajabamiluw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=perikarditis+adalah+pdfPDF 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_off0000e471.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE471 17892 bytes
SHA-256: 93990d5f60f8968c41b68d1a1a2b106a80761d54926046216a40d3c6f700f03a
font_01_sfnt_off0001132c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1132C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012b43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B43 10464 bytes
SHA-256: 5f44cad95746ddad56b37732298e5fe8ad51f7aab37a9a14d26d0beaad394ade

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