Malicious PDF — malware analysis report

Static analysis result for SHA-256 44e5e7c5e2ae17a1…

MALICIOUS

PDF

67.0 KB Created: 2020-11-25 19:23:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 8701395ccfd3bcfe08d82506f146a4dc SHA-1: d80ff0c87b8a863a0760369a7942ebb2114596c6 SHA-256: 44e5e7c5e2ae17a1b5526a03bd70eb317f2c68701ae1da3795105b0cd7eeec14
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://trafffi.ru/strik?utm_term=pltw+biomedical+sciences+pbs+final+project+ideas PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366031/normal_5f89d8a7d81ff.pdfIn PDF document text
    • https://betoxugibujimiv.weebly.com/uploads/1/3/1/0/131071043/tewilaza.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391899/normal_5fa34171069df.pdfIn PDF document text
    • https://sogatetemurus.weebly.com/uploads/1/3/4/3/134379625/5605990.pdfIn PDF document text
    • https://xujaxivef.weebly.com/uploads/1/3/1/4/131438557/weseniwajela-lemufijito-jenuwugagimexon-nodajabexubolo.pdfIn PDF document text
    • https://pinozawekik.weebly.com/uploads/1/3/4/5/134589254/3599988.pdfIn PDF document text
    • https://dutigopomifit.weebly.com/uploads/1/3/4/6/134611267/7a0a1600910f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409110/normal_5fad2686d9a31.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/xamibebulosaxug/iso_to_usb_bootable_windows_10.pdfIn PDF document text
    • https://s3.amazonaws.com/tibanepoxilibud/93569814566.pdfIn PDF document text
    • https://s3.amazonaws.com/gonavo/vimugeno.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b59f5a5d-7d66-4268-823a-71780f67617a/63839190289.pdfIn PDF document text
    • https://s3.amazonaws.com/visagogijulep/dikijuwu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa9792dc-7e92-4294-b2ab-6fbc7234f0d4/zujonomipujazeda.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_off0000c868.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC868 5612 bytes
SHA-256: 8cbac7858ed44b3f32aa65cacd9a1a112185f1ed44e4ea715191498c0e257622
font_01_sfnt_off0000db74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB74 9896 bytes
SHA-256: 9296e3f074919912def82fc8534bf96e81c86cd6c72b008cc1be6e8f378e6de5

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