Malicious PDF — malware analysis report

Static analysis result for SHA-256 fac81318455e00f2…

MALICIOUS

PDF

82.5 KB Created: 2020-12-29 22:31:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: dda35dd34c3fa22bce05162988f75191 SHA-1: e002e1b5a3f174f3307032317633e43dfb49ad75 SHA-256: fac81318455e00f22e3639e63f5601e5703851b3ccb4e9f1d33d8ff9adf69230
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 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffset.ru/strik?utm_term=descargar+mlb+perfect+inning+2020+hackeado PDF link annotation
    • https://jokuduzasaru.weebly.com/uploads/1/3/1/3/131381103/waxajolez_zutupajivep.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484995/normal_5fc44dca0061b.pdfIn PDF document text
    • https://cdn.sqhk.co/gotirawuz/iihdi64/pafupitederafavidamawim.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417213/normal_5fdfadebeaa4b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366645/normal_5fe58fa839ee5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383308/normal_5fc40621f1960.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381737/normal_5f8cb72d2649f.pdfIn PDF document text
    • https://cdn.sqhk.co/zafupusapun/c7icSgg/aliens_like_milk_gamezhero.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415519/normal_5f980a8c6614d.pdfIn PDF document text
    • https://jevezorubik.weebly.com/uploads/1/3/4/8/134864628/jepefigoninuroga.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376358/normal_5fc8efc701634.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/d6d703c6-51c7-4c6b-87cc-57e98da562e4/wuxaxoturi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40732467-fc33-4dbd-9a54-73f2421f8b6c/93067449552.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b7f8294-98ca-4d0a-953b-0c03991a63bf/87260045624.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dce3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCE3 5832 bytes
SHA-256: baaf4304d3bdec1dbae4327f7bd4dec7e7f7873a6d3d9a6ec201f771ae440e61
font_01_sfnt_off0000f083.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF083 11716 bytes
SHA-256: ab314d475835d53e1d1e3b77ced963084c1edd9fb84a67266b91a473c3bd6148
font_02_sfnt_off000116fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116FE 16232 bytes
SHA-256: 7edd081f03f88087b9848d782f084c8dc9854c721f28da1c2c3c7df47c0b5aba
font_03_sfnt_off00012c5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C5B 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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