Malicious PDF — malware analysis report

Static analysis result for SHA-256 bece955024376b39…

MALICIOUS

PDF

76.5 KB Created: 2021-04-05 14:32:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 9d58d10bf5d87ce5720933a75db19ee2 SHA-1: 5535b613d05b14eaa379f55c242d570c5f94bff7 SHA-256: bece955024376b3902616d4760aa2b5527641f5848614ad938a073a05d195c8b
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://zajinet.ru/award?keyword=auxiliary+verbs+examples+pdf PDF link annotation
    • https://cdn.sqhk.co/kufomopinu/iijcchX/pill_mania_online.pdfIn PDF document text
    • http://streamsweets.com/xobomugeweka8a1c.pdfIn PDF document text
    • http://meetchat.space/java_8_features_javatpoint0y1y3.pdfIn PDF document text
    • https://cdn.sqhk.co/romumoxoleno/ohdozic/samexobadikuvisorozepufe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411923/normal_6004dfe54f898.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380871/normal_5ffad88e8103a.pdfIn PDF document text
    • http://pagebake.com/16578144077mvcsz.pdfIn PDF document text
    • http://keysecret.ru/wolverine_f2d_saturn_digital_film__slide_scanner_reviewg7z0b.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/fajixe/place_animated_gif_into.pdfIn PDF document text
    • https://d5aacb37-8766-4234-9cc8-c2ec3b911aba.filesusr.com/ugd/1e723b_7e1de02ef4f64ccc924e6aa91b4e6657.pdf?index=trueIn PDF document text
    • https://bf808793-8b46-4c54-8b11-319763181fa0.filesusr.com/ugd/0d018b_6f5714990ff14bbb9db6bf500acabe6d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d684d120-cffb-429b-a3a7-5757c9818832/38231147363.pdfIn PDF document text
    • https://9f2a6cc1-6e15-4467-beaa-57274ca996ed.filesusr.com/ugd/78f4c3_bdffdf5d5aef4814aa2f95e54e122881.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sumesawoxajew/cr7_images_free.pdfIn PDF document text
    • https://s3.amazonaws.com/vetamedisoz/nodurejezuze.pdfIn PDF document text
    • https://s3.amazonaws.com/vukujidor/62917496510.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/507cd236-1d7f-474d-ab1e-133028a2da83/84272456537.pdfIn PDF document text
    • https://s3.amazonaws.com/xixonu/47149206012.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed198fe2-ad00-4205-a871-2a6446dcfd61/q_significa_inteligencia_emocional.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_off0000ee5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE5D 5548 bytes
SHA-256: 31ce5c4babdf47388ca0f7f4ec8f20ce2a81f3c031da04b7a7310297529dd411
font_01_sfnt_off00010132.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10132 10512 bytes
SHA-256: 6a7e586fb923b904e0204d3ccd64912d1ac502b4903800263073785ae246d8fd

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