Malicious PDF — malware analysis report

Static analysis result for SHA-256 8119d25864f3f9ea…

MALICIOUS

PDF

84.8 KB Created: 2021-07-05 02:23:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 0167833b84445fbcfca3aa515a9a718d SHA-1: 93c55980a248ad28910c237711e93d0d343d92f9 SHA-256: 8119d25864f3f9ea7905e9e2bee956c00cea7580c79dd7e2198c5baeca0b381c
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm or phishing lure. The 'SE_CALLBACK_LURE' heuristic suggests a callback phishing or tech-support scam pattern. While no scripts were explicitly extracted, the presence of embedded URLs and the ML classifier's high confidence score point towards malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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 http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/5d3338ac639699fb0500834e67ff6f06/47382321105.pdf In PDF document text
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/160b847ffc7627---lubogegupu.pdfIn PDF document text
    • http://gabortech.com/admin/file/fefutojelapogonujimobo.pdfIn PDF document text
    • https://henklinders.nl/henklinders/upload/files/82978768479.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/o79nbg2cg8eiltt8lqqgfve1mm/nozowagibotaguk.pdfIn PDF document text
    • https://nutricionintravenosa.com/wp-content/plugins/super-forms/uploads/php/files/8c930b7b6ef26e1290cb2a89ba9ec72d/45644410061.pdfIn PDF document text
    • http://zge-led.com/luodan/images/userfiles/file/82504901215.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/5da590f7c11fa1f09f9f65139aebe5ae/51823849658.pdfIn PDF document text
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098798d7c7dd---60514497174.pdfIn PDF document text
    • http://tomaszfilipczak.pl/userfiles/file/96687836205.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160954f57c03ca---6503301073.pdfIn PDF document text
    • https://daaeportrett.no/upload/file/kuzadinanid.pdfIn PDF document text
    • https://www.alignerco.ca/wp-content/plugins/super-forms/uploads/php/files/c3ce3267bc1923f6ed3cddc3ad5a5aae/ropuwapumepomeli.pdfIn PDF document text
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/b839aec6397039f43ac85af6e1c2ce12/nuniganutovo.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/efd7b4d4fb141cbed1d8156d180254c7/nawupoveg.pdfIn PDF document text
    • http://kondicionery-ivanteevka.ru/upload_picture/file/35258790275.pdfIn PDF document text
    • http://ebanksunited.com/clients/7/7d/7da19d52c1086e69e61582739ce98a0f/File/jutijebamofewunekirilor.pdfIn PDF document text
    • http://libron.pl/fckupload/assets/file/vebevufabotodugifowidulo.pdfIn PDF document text
    • http://waltwhitmanclassof1965.com/clients/c/cc/ccbfa8a87e297cd67510599b8aebcb74/File/87430717429.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/6ab477e27511718c6e56850cbcf21660/6715560950.pdfIn PDF document text
    • https://aslimitada.com/userfiles/file/fokirevasotilezokasatani.pdfIn PDF document text
    • http://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a3d0388ed5---19912777699.pdfIn PDF document text
    • https://www.nuyew.academy/wp-content/plugins/super-forms/uploads/php/files/3d3d8322b1dd3a3769f4b73529f43330/62250963699.pdfIn PDF document text
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16077593b2f01a---44597523355.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=supposed+to+in+a+sentencePDF 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_off0000e5fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5FA 18148 bytes
SHA-256: 5b0f0b88e226873980798f6ce37dc58df4f06e23b94b9a981a91e8fd0aa4cc6e
font_01_sfnt_off000115de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115DE 10536 bytes
SHA-256: 32f8357db37c81ae24992f740616fee6f1b9f8569f2d74b9270f3470c427902f
font_02_sfnt_off00012dfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DFC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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