Malicious PDF — malware analysis report

Static analysis result for SHA-256 758c339724d1f15c…

MALICIOUS

PDF

93.4 KB Created: 2021-06-17 06:29:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: b008fdc7025267823122037dd439e8f2 SHA-1: d949a3a76584cc725b0ed6737b2b4b705ba52dee SHA-256: 758c339724d1f15c9ad24cbc57ee32938236c5fe7df2f3204bee544cc0053ef4
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. The document contains numerous links to external websites, many of which appear to be compromised WordPress installations used for hosting malicious PDFs. The heuristic 'SE_PAYMENT_REDIRECT_LURE' strongly suggests the document's content is designed to trick users into believing there are new or changed banking instructions, a common tactic in business email compromise schemes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://philabc.ru/uplcv?utm_term=get+instagram+followers+free+2020 PDF link annotation
    • https://www.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608746f87f5ea---10363685715.pdfIn PDF document text
    • http://altelaw.com/uploads/image/file/gutebogu.pdfIn PDF document text
    • https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/g0f2se6nmnuul2hjhpfn9h252b/92962607074.pdfIn PDF document text
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/0loqh3n2mlhs6usleqb26oc65l/dimomelafawimubi.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/1608fd7e516814---84837753075.pdfIn PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/2q0cc8hbhi5gbcn8pulvfud600/nobowufarum.pdfIn PDF document text
    • http://franzoesischebulldoggen.eu/userfiles/file/delomakapojavit.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/vsfcpngk4k855ndg70arcka7e1/sasuwirineluvoxemap.pdfIn PDF document text
    • https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/e7523c139f289fc6a22440d70619d20c/mirokanorirege.pdfIn PDF document text
    • https://mannerfeltdesignteam.se/ckfinder/userfiles/files/vavogajabukarurokesitele.pdfIn PDF document text
    • http://www.pilonidalsinus.gen.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607cafbb63889---pimefunazezugeba.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/14af1c10bef02c478d355c98742f13b1/42939802343.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608604878a449---tebedamejipafumotibes.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/24af9dd0f89bd580d64900dd4e6bfad4/vixulikarobitex.pdfIn PDF document text
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/74a4ad064ba789772287d036f35af3de/sogasalawekuposemofipaga.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160a453b151664---gufekoganogojinakovaxo.pdfIn PDF document text
    • http://domeinbeverdonk.be/assets/files/file/xeseginobikemaneduworof.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000124b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124B1 5484 bytes
SHA-256: 5ee9310a56a621f436b0f1e9436ab51c5b0d3612ebf17d214e6e8f3016901af8
font_01_sfnt_off00013752.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13752 2212 bytes
SHA-256: da6d78aabf2e0c131008e37c11e4029f2c1c73ee37dba6522cd96161b08373bb
font_02_sfnt_off0001416b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1416B 11340 bytes
SHA-256: 3f4717186bc663d4e8e87e64630b65c15bcd0d32ec2746ef01c1c8608d03f081

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