Malicious PDF — malware analysis report

Static analysis result for SHA-256 b054921b98945f4b…

MALICIOUS

PDF

65.4 KB Created: 2020-11-18 08:40:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: b10edcaf0763080b68baa29ce905eb57 SHA-1: ff8b4ba0e5e52940ba58107f1d788d44fadf55f0 SHA-256: b054921b98945f4b9a48933057c7c03f0dc0d30be0444040fbbd75e36a7fa95b
222 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links, with at least one pointing to known malicious redirector infrastructure (ggtraff.ru). The document body, though heavily obfuscated, suggests a lure related to graphic design templates, likely to entice users to click through the malicious links. The presence of multiple external PDF links further supports a link farm or redirection strategy.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wb?keyword=graphic%20design%20images%20templates In PDF document text
    • https://cdn-cms.f-static.net/uploads/4455670/normal_5fb41d576d7eb.pdfIn PDF document text
    • https://tenimevu.weebly.com/uploads/1/3/4/3/134315692/pozegub.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370294/normal_5f8c003ceb469.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501364/normal_5fb27ce8b10d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478125/normal_5fb273fbb820b.pdfIn PDF document text
    • https://zupusifeduligam.weebly.com/uploads/1/3/4/3/134313264/1aaa60443e9.pdfIn PDF document text
    • https://vodexekuteb.weebly.com/uploads/1/3/0/7/130776001/62b978b206.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369179/normal_5f8f050e08a0c.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/49f09a72-8558-448a-978d-271429cdb732/animal_diversity_7th_edition_test_bank.pdfIn PDF document text
    • https://s3.amazonaws.com/kizugokofo/susonoxow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/740335f0-5956-4448-8e6a-fb2c33b9f8f2/72098833529.pdfIn PDF document text
    • https://s3.amazonaws.com/jefazaxal/relationship_between_badger_and_honeyguide.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/lowaval.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_off0000c298.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC298 5520 bytes
SHA-256: a929b416a4773edd8c37449a9aa11cd11d2f7bcd484fb37a6d138bf7bae67602
font_01_sfnt_off0000d531.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD531 10440 bytes
SHA-256: a5a05c38bad80f493b8cb9afce0073fd989ab5ec44cd01b257fa1381815e9790

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