Malicious PDF — malware analysis report

Static analysis result for SHA-256 1545ffc2972f1d18…

MALICIOUS

PDF

84.4 KB Created: 2021-08-16 18:18:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 1ed70c55422685b95dbca72cc464a003 SHA-1: 2de2a7d3574a1329214421155d582ee4cb9130b9 SHA-256: 1545ffc2972f1d18ffd0f4149e14b9af1997b08b3da16faed8a6c7ba320418c7
156 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. Heuristics reveal it contains a link farm pointing to compromised CMS upload storage and disposable hosting, suggesting a phishing or malware distribution lure. The embedded URLs, while some are marked benign, contribute to the overall pattern of directing users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://leesman.com/wp-content/plugins/super-forms/uploads/php/files/05623fb20a347a68aa43006db5c1913d/52959210235.pdf In PDF document text
    • http://www.biotanika.pl/upload/file/tamodidaber.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b004d15dcb3---92685561528.pdfIn PDF document text
    • http://srihemkuntsahibfgp.org/hemkunt/userfiles/file/bazunevamegetamisagevemu.pdfIn PDF document text
    • https://gencshoworganizasyon.com/upload/ckfinder/files/93537712037.pdfIn PDF document text
    • https://www.duffylighting.com/wp-content/plugins/super-forms/uploads/php/files/d8dbcb0ffb24d5fa70eeaaf97437c7c8/kixepuxezubijerak.pdfIn PDF document text
    • http://gibkrakow.pl/uploads/files/63267173526.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160868cb89e159---ginorosuxitoveva.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/obl33n4k8nc33l3kpfn9oe1s0d/lovebesepixuk.pdfIn PDF document text
    • https://zebcom.in/userfiles/file/zavazesamegafo.pdfIn PDF document text
    • https://windfreeklima.com/upload/ckfinder/files/jedulawipulevejunakedix.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160be2b493c923---20261207224.pdfIn PDF document text
    • http://am-assets.com/aom/magnolia/userfiles/file/magavesa.pdfIn PDF document text
    • http://suaups.net/userfiles/file/sitezuzejagolepetinez.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16079c0f06eae6---85539208505.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f3509b7c244---siwatetofonokivodoka.pdfIn PDF document text
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/52e68f16587a2a6de53571140e3cdac6/buxozugeridikazekususa.pdfIn PDF document text
    • https://afra24.com/basefile/afra24/files/gorabonukupopawigidevola.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/f226355a42e0d23262fe4bc735411eef/dowukezekuvusela.pdfIn PDF document text
    • http://k-yoga.org/file_upload/spaw_upload/file/20210729175925.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160af98a4ec4cb---mifiwuduparabodore.pdfIn PDF document text
    • https://korzayithalat.com/spot/admin/fckeditor/userfiles/file/17809360236.pdfIn PDF document text
    • http://hongshengfish.com/uploadfiles/2021052405433161222.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16080b8d2c79fd---77810854353.pdfIn PDF document text
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/072eeab7072e100b6b8c8d3d47c46b12/44493085446.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=atomic+bomb+sound+effect+free+downloadPDF 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_off0000e5ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5EE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fe05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE05 10944 bytes
SHA-256: f72fd3f5b8772d7b97896552792da69822f4b100bfbe60c72966b842f2296590
font_02_sfnt_off00011773.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11773 17236 bytes
SHA-256: cbfead4753ce214b9e17aed694e2778b0eb723e84f22eddf3d976b7a8d881516