Malicious PDF — malware analysis report

Static analysis result for SHA-256 3052e0f06d667926…

MALICIOUS

PDF

99.6 KB Created: 2021-05-28 10:57:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: a9845007fbc9afb497a499ec6ae2db86 SHA-1: 72be0a951769f75a43ae32380715ee42bb4464e6 SHA-256: 3052e0f06d6679263ca01255480ce5bec72c15597f3823d341127f3cd46d60df
156 Risk Score

Malware Insights

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

The PDF contains multiple links pointing to compromised WordPress sites, indicating a link farm designed to manipulate search engine results or redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of a malicious document, potentially leveraging embedded JavaScript for redirection or obfuscation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606eae764a357---63593346718.pdf In PDF document text
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/5bbbfda22499b705ed4c8e90db205a64/lubazi.pdfIn PDF document text
    • https://ols.lighting/wp-content/plugins/super-forms/uploads/php/files/ccee12edba8de43c9d1ad223ac09973f/xagaseloxopug.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160840d9f3eac8---2722783162.pdfIn PDF document text
    • https://robotics-institute.com/wp-content/plugins/super-forms/uploads/php/files/rbdflqiosblc4fhg5gla2rspdk/zubakal.pdfIn PDF document text
    • http://warraichmeats.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f771b4f349---legoxumopebixo.pdfIn PDF document text
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/9147d3332570a6e754ea1b3b65da6b18/jusedeluworodulamexi.pdfIn PDF document text
    • http://limoride.net/gallery/file/jetovegenigoxewiropaguxox.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607395622d48b---dakabaxikizad.pdfIn PDF document text
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/b38616c1a7a97b54fd1e4f63ad745615/gurakut.pdfIn PDF document text
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/16077c85e50280---zuzabizopamati.pdfIn PDF document text
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/2ecf119e5b095a5226c78b10a0be3abf/85614877857.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1609cced5c6b43---13840579514.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c73c40f99c---28196446851.pdfIn PDF document text
    • https://otelnamore.com/wp-content/plugins/super-forms/uploads/php/files/d6e75eb1232e3c8df18ee156a815d991/xikutoxipiwu.pdfIn PDF document text
    • https://ivfnna.gr/wp-content/plugins/super-forms/uploads/php/files/c1ba5a0a74d58c8d032053d216fddeaa/dovojadeje.pdfIn PDF document text
    • http://auto-spec.ca/fck/file/wivuzebekiloget.pdfIn PDF document text
    • https://imagebeaute.fr/userfiles/file/35076750305.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=how+much+does+1+gram+of+18k+gold+costPDF 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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f828.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF828 6416 bytes
SHA-256: 62deedb54aaef669db635f4ef87d4bda5d475a8bf20633d6b56d9e4ab12fd410
font_01_sfnt_off000107fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107FD 5800 bytes
SHA-256: 9b80da08587a22473584b5a8c76571f58261ff4b223af18fe89c9ed7fdc32125
font_02_sfnt_off00011ba2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BA2 9876 bytes
SHA-256: 26d81234d3896f4ec88dea21bc924a754cd5338426027b945074845888dc6f06
font_03_sfnt_off00013b80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B80 11320 bytes
SHA-256: 25bc1ab2d04c62dd841d2906e956667877d0c956013034380f2cae4eb9ba9895
font_04_sfnt_off0001628b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1628B 16256 bytes
SHA-256: ade860a384e0436df56bb84eeed4a9486ec680d7c8981cdb0c3745c5e2239263
font_05_sfnt_off000177e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x177E6 1740 bytes
SHA-256: e51ca0148e7e0aae4eb42a5f75a65a08a0f66e9857e45ec5485c6aa46bc5905c

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