Malicious PDF — malware analysis report

Static analysis result for SHA-256 5575c81b9895faf2…

MALICIOUS

PDF

63.2 KB Created: 2020-11-12 23:46:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 1609592e8cd0c7f83ec491eefdcac4e0 SHA-1: 93278221cd5b0f48e30f8011214acb772eb2a335 SHA-256: 5575c81b9895faf24eed41992927e5e067c37aefd402ed5f8dce265ce9083b96
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ggtraff.ru/123?utm_term=valentines+day+pictures In PDF document text
    • https://cdn-cms.f-static.net/uploads/4373522/normal_5f9b37f05d8a6.pdfIn PDF document text
    • https://wexabegolorumad.weebly.com/uploads/1/3/4/3/134351445/kavuxavoxixo-vitif.pdfIn PDF document text
    • https://xukutejupu.weebly.com/uploads/1/3/4/4/134487517/8461327.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367951/normal_5f8f55150da77.pdfIn PDF document text
    • https://rikurifijuse.weebly.com/uploads/1/3/4/6/134681474/2743582.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475985/normal_5fa62756cbdfa.pdfIn PDF document text
    • https://pibemalogodozod.weebly.com/uploads/1/3/2/6/132681910/8943725.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393018/normal_5f95b3b96ca06.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/84b18ece-4a86-4ad2-99c0-7d53aa9c0cd3/97070370090.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b989c864-03c3-42cf-a512-975f2db16936/63983707133.pdfIn PDF document text
    • https://s3.amazonaws.com/dinisemowoge/wasipebuluwewomotazapej.pdfIn PDF document text
    • https://s3.amazonaws.com/falevi/vonalexutozopa.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_off0000bbd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBD8 5136 bytes
SHA-256: 2eaa7fd4242f506ceccbb6aafc7ab961f8c7ecc8030c542dee4f9cd74037d0da
font_01_sfnt_off0000cd68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD68 10056 bytes
SHA-256: 9648df8ea617a83fb713286c6cb9f7f23c1e8b43a41b941f8d80cbab409e8773

Open this report in the interactive analyzer, or submit your own file for analysis.