Malicious PDF — malware analysis report

Static analysis result for SHA-256 61acc289d31e7c9f…

MALICIOUS

PDF

59.4 KB Created: 2020-12-14 08:31:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 4c39636d99d053f80f4765a9daee8d33 SHA-1: 07edf3c780ccc514bac8ed342cd452a9be489e9c SHA-256: 61acc289d31e7c9fcc0c92637f28d8d42c160dd3d8f954f8b3b0d25452dbf35d
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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 links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://cctraff.ru/aws?utm_term=panasonic+aw-+he40+service+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4379369/normal_5fb9c59cc4b97.pdfIn PDF document text
    • https://lijasefevofik.weebly.com/uploads/1/3/4/8/134889997/junalewosururigimusi.pdfIn PDF document text
    • https://goduvozimaku.weebly.com/uploads/1/3/1/3/131380582/4245519.pdfIn PDF document text
    • https://zozilevijuni.weebly.com/uploads/1/3/1/3/131383476/xugonerus.pdfIn PDF document text
    • https://piwoviwilo.weebly.com/uploads/1/3/4/3/134386066/busobuwezo-fijalel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473645/normal_5fd2f41db0ea8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c01d4df9-57f8-48c5-b711-399194154468/23134138181.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f00f6fc-f515-405a-b7ad-93fdc2e01ec5/definition_of_development_studies_pd.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfc4960b-524a-49f1-8042-17417145a06d/43016491399.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72b9941a-f167-4d59-b7d8-ee4c3e7bc3e4/anatomy_and_physiology_made_incredibly_easy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03b3130c-dae1-41ae-9bd1-bc943d610de6/1531584616.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e020bc8b-08d4-4e2b-96ff-ac097691467b/watch_series_io9.pdfIn PDF document text
    • https://s3.amazonaws.com/nabifovu/pediatric_dyslipidemia_guidelines.pdfIn 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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000aaea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAAEA 5456 bytes
SHA-256: 76f41ad32d5ccfc8a07ffb7bdb480723518f3f75342dc8bd99eeeb73d6cf3d24
font_01_sfnt_off0000bd6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD6D 10216 bytes
SHA-256: 34cb7c77301207d9a448d88318055e92e3f60077d7a128483e9c40fb4cfafd08

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