Malicious PDF — malware analysis report

Static analysis result for SHA-256 786adc272261c040…

MALICIOUS

PDF

45.9 KB Created: 2020-11-07 05:07:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: c291d0c9ca27e2c6c963f52e9b8b07a1 SHA-1: 7564401893056c44a87611da4987fe14ce9e3a25 SHA-256: 786adc272261c0401a97556dcef3eb9d9de3ea898c915673f8ca4d165deb1efb
124 Risk Score

Malware Insights

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

The PDF contains embedded URLs, with one identified as a malicious redirector. The document body, though heavily obfuscated, appears to contain text related to ornamental plants and includes the malicious URL. This suggests the PDF is designed to trick users into visiting a malicious site, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 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.
  • 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://traffine.ru/aws?keyword=nombres+de+plantas+ornamentales In PDF document text
    • https://vevinobe.weebly.com/uploads/1/3/4/4/134487659/7968435.pdfIn PDF document text
    • https://niramividaro.weebly.com/uploads/1/3/4/5/134517418/potukozizufuwugu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372074/normal_5f8f3a77377af.pdfIn PDF document text
    • https://giledaxije.weebly.com/uploads/1/3/4/3/134312043/355013.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://tilemidif.files.wordpress.com/2020/11/john_deere_diagnostic_codes.pdfIn PDF document text
    • https://devoromul.files.wordpress.com/2020/11/maplestory_reboot_cubing_guide.pdfIn PDF document text
    • https://pifakimep.files.wordpress.com/2020/11/fododuxuxinoni.pdfIn PDF document text
    • https://mijevefiwi.files.wordpress.com/2020/11/damawasivuxuxavajodax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fea4b671-5d14-4e67-8840-75e62e872537/24706945794.pdfIn PDF document text
    • https://xuxedoki.files.wordpress.com/2020/11/pumusoxekovone.pdfIn PDF document text
    • https://wobonil.files.wordpress.com/2020/11/63729759713.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000074c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74C4 5216 bytes
SHA-256: ea80d28ecc66ddec053e54d9bf09e9306855c2293dc3df11e678639f1ba07b4a
font_01_sfnt_off0000865e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x865E 11348 bytes
SHA-256: 48f81efbd0cc50915ca458f188e47deb3887c73f328f09f738564436a91bb0b1

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