Malicious PDF — malware analysis report

Static analysis result for SHA-256 9acd51e292148a43…

MALICIOUS

PDF

96.2 KB Created: 2021-07-03 04:51:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 863a6cb85d133c2fe29b9b1e5e0e9cc5 SHA-1: f37436f464af1c0c39c90efdd53c6e4495d457d6 SHA-256: 9acd51e292148a438e9b8054e3f8c7e15c492fa9c371cb25b089aeb1f9509adc
156 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. Heuristics reveal it functions as a link farm, directing users to multiple compromised WordPress upload storage locations and other unknown domains. The embedded URLs suggest an attempt to redirect users to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://vieclamhanoi247.com/upload/files/99997859187.pdf In PDF document text
    • http://cementfeet.com/userfiles/file/42725435368.pdfIn PDF document text
    • http://beerskiboot.com/img/upload/file/56556927518.pdfIn PDF document text
    • http://k-souz.com/userfiles/file/75608029619.pdfIn PDF document text
    • http://clubmaniacr.com/campannas/file/12666271805.pdfIn PDF document text
    • https://rajatotogroup2.com/contents//files/palekekipowugetizerizun.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e18878f875---pilefefanavapa.pdfIn PDF document text
    • http://tfh-filter.hu/_user/file/dokolelor.pdfIn PDF document text
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/09cf02e5c29bb2e93f9e22e5d5731763/dupiwi.pdfIn PDF document text
    • http://pelesiuvalymas.lt/i/File/75795111838.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2904b88016---28832314287.pdfIn PDF document text
    • https://businessservicesuk.com/userfiles/file/zodipu.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/42889d5801b6a0eb74fe049d4a6c51d0/62853834240.pdfIn PDF document text
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160852856efa5d---76128282825.pdfIn PDF document text
    • http://vinmexindia.com/uploads/segidedebovuzujal.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160bbfae4ad84f---91599672063.pdfIn PDF document text
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/772e852dd8a6b267c40834bfe4a322fd/64891406537.pdfIn PDF document text
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/k71usifv8eo2vfk8plb06dc1v9/88012743278.pdfIn PDF document text
    • http://cuatro-pr.org/sites/default/files/file/juxisikodomodug.pdfIn PDF document text
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/asvfhnit54v6egi5tuf121t9j5/nejajulafipuvufo.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b989ad997c3---wepofetutaxovasos.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/vtgo1eck18dqbk21abfdugrlr1/53038828484.pdfIn PDF document text
    • http://kristenpell.com/userfiles/files/55977142895.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=ill+defined+hypodensityPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000118f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118F6 10396 bytes
SHA-256: 56825ae1bb7fd6c6dd138a430b19b94875b094657e4264e3f26e56450775a097
font_01_sfnt_off00013058.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13058 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001486a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1486A 16684 bytes
SHA-256: cbb2a89f08dc1cd93ef806a2b9b97870dc633775a4f9c9b8d78aba2135f702ad

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