Malicious PDF — malware analysis report

Static analysis result for SHA-256 78c4dfb654b12e8b…

MALICIOUS

PDF

73.0 KB Created: 2020-12-26 09:54:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 12c267f64a65bdf337ac616931cb5ddf SHA-1: 91ad49b1277285fff5442af815088f90bc7684de SHA-256: 78c4dfb654b12e8b4d7bb344362b989eb04f8e1429b4c89418124c60cc4f59b7
154 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 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 4

  • 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.
  • 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://traffmen.ru/strik?utm_term=rc+scale+warbirds+for+sale In PDF document text
    • https://cdn-cms.f-static.net/uploads/4388041/normal_5f989c1994d52.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385436/normal_5f9f758bc2049.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486997/normal_5fc3e0a668196.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366010/normal_5f887bbd989d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367283/normal_5f87ac17bc2f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413578/normal_5f9ef994d93d4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481675/normal_5fe5008844691.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413362/normal_5fe018cec5afa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501963/normal_5fdeb29e58809.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390373/normal_5f9dcbbd4df46.pdfIn PDF document text
    • http://www.opentle.orgIn 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/8686d482-71c9-4fbf-9914-cff1fee4dba2/lebifamasujonuwatijevuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba0e6b88-c9b6-41ea-8a25-9c9699d314df/fairfield_county_jfs_phone_number.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cc04110-9f6a-4bd8-9388-2282ffa78913/79607826793.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://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 4

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000d0ab.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xD0AB 12076 bytes
SHA-256: 6d3d388cd93b12c9ffd7231331e382ce53e104f6c99245c762f88ffffb0aa747
font_00_sfnt_off0000beb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEB0 5252 bytes
SHA-256: aaeaf4f74dfc134248a414f40fd113fb9fadc00f90aaaa0898688bcad308a991
font_02_sfnt_off0000f305.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF305 10596 bytes
SHA-256: 65dcf9bfd18dc06722ada181ecdee9f72f79e00ab94b4fa16c2ff7dcf7a13015

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