Malicious PDF — malware analysis report

Static analysis result for SHA-256 00a192c786905e59…

MALICIOUS

PDF

69.4 KB Created: 2021-02-19 01:57:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: ec9a62d36be43f4bcf8addf565a8b9a2 SHA-1: 16e2e8347725746afd727c7af7860c66bbee6e1e SHA-256: 00a192c786905e59adb84477c801dc3458bc25a5a8073568903169190e358461
156 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. 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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://crophysi.ru/wix?keyword=chapter+3+the+biosphere+test+answer+key PDF link annotation
    • https://serirufudo.weebly.com/uploads/1/3/4/7/134712976/cf203e3a14.pdfIn PDF document text
    • https://gulesome.weebly.com/uploads/1/3/4/4/134496781/bb2b32cf6c8.pdfIn PDF document text
    • https://remejatezikame.weebly.com/uploads/1/3/1/0/131070309/8057752.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382406/normal_602b239d2de0e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495531/normal_5fdc79f375272.pdfIn PDF document text
    • https://wotixefutakit.weebly.com/uploads/1/3/2/8/132815753/4688459.pdfIn PDF document text
    • https://rofosuvobatijam.weebly.com/uploads/1/3/4/6/134661532/3442330.pdfIn PDF document text
    • https://tegomufowake.weebly.com/uploads/1/3/5/9/135958876/4ebf6df55.pdfIn PDF document text
    • https://nubapatis.weebly.com/uploads/1/3/4/0/134095887/lagak_sesulexisar.pdfIn PDF document text
    • http://pifozuvarivin.22web.org/besezibokamoda.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xewofikedufika.epizy.com/72250138246.pdfIn PDF document text
    • https://s3.amazonaws.com/kokesatodixon/autostoperski_vodic_kroz_galaksiju.pdfIn PDF document text
    • https://s3.amazonaws.com/gitipelut/mht_cet_answer_key_2019_link.pdfIn PDF document text
    • https://s3.amazonaws.com/pibajuwi/zotofowim.pdfIn PDF document text
    • https://s3.amazonaws.com/bulolimepol/2338371389.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 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d14c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD14C 5340 bytes
SHA-256: 12d43eb0553d052e092a71a18c6109d66c6ab824206e86a08dc673b3aa75d6ed
font_01_sfnt_off0000e37d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE37D 11032 bytes
SHA-256: e8de13acfb23dd89d841381ece881fdb630402ea3a5c7010f221cfeb39c53133

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