Malicious PDF — malware analysis report

Static analysis result for SHA-256 8342385117235f16…

MALICIOUS

PDF

82.1 KB Created: 2020-11-14 20:05:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: f4c51bc9813b91e69b86545a50d1dfd0 SHA-1: df01370bfc69e67c36f81161d871d04bf205ef9b SHA-256: 8342385117235f1605691e6e183ad018580f5a1216f12237bb58f20e19ade5da
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 embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Invisible/repeated PDF links deliver payload file critical PDF_REPEATED_PAYLOAD_LINK_LURE
    PDF uses invisible link annotations and points to a direct payload download. Repeated invisible links or lure-like payload names such as document/unlock/verify archives match malware-delivery PDF carriers where the page is only a prompt and the real payload is fetched from the linked URL.
  • 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://trafffi.ru/123?utm_term=air+elicenser+emulator+setup.exe In PDF document text
    • https://cdn-cms.f-static.net/uploads/4388617/normal_5f8e2688997b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428054/normal_5f9b0f89d5d7b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375509/normal_5f9699912452a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402707/normal_5f9619090892a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366369/normal_5f8d6f5f33051.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480580/normal_5fabe3c999946.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380700/normal_5fac0e656f399.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421208/normal_5f9a50b0920e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426557/normal_5faa692f50906.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mavixu/xesubefugaruvaxozagote.pdfIn PDF document text
    • https://s3.amazonaws.com/dowavelaxam/asi_se_dice_in_english.pdfIn PDF document text
    • https://s3.amazonaws.com/nakevoja/northway_sports_ham_lake.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 3

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
font_00_sfnt_off0000f644.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF644 3340 bytes
SHA-256: afb979def02879972985790f2fc4d199a2a7d3ec9f1422ef6b542502655fda61
font_01_sfnt_off00010238.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10238 5168 bytes
SHA-256: 949f61636a61027ba3c49d6dc72406ec1babb2949ed379c63cbbb503e14018a8
font_02_sfnt_off000113bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113BC 11704 bytes
SHA-256: 553b3bd57ab2d3f3e69b0870fc6be105884f619e2563fa877f210a976f49e06e

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