Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e7648348c986d28…

MALICIOUS

PDF

91.3 KB Created: 2021-05-30 23:14:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: b28c3ac62fe9725d7ffa0c28d690c8d9 SHA-1: 7011fc50a497d3a33d40d2a68ce7e709f05d0c72 SHA-256: 8e7648348c986d2806d214efbac059cfeefdea83574823902c95316dca85ee52
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 0.9995

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://xajibur.ru/strik?utm_term=abu+garcia+ambassadeur+5000c+specs PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4483833/normal_605a361ded965.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474978/normal_600a17bd5c5dc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391642/normal_6009687cec3cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388174/normal_604aa304362dc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410730/normal_5fe40c021ff5f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367301/normal_600285db23037.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470523/normal_5fdd59c4741ab.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452624/normal_5ff98d2dc09a7.pdfIn PDF document text
    • https://zepafasamog.weebly.com/uploads/1/3/4/3/134361306/5337563.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447464/normal_6067395abf3d6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497093/normal_5fccda04491ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408990/normal_6047223411dd4.pdfIn PDF document text
    • https://robivitoj.weebly.com/uploads/1/3/4/3/134334713/rodevakiperelumix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381532/normal_601d5b99676e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367944/normal_605e10095466a.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/fda60af3-d6fb-4b29-80d9-d8e9a3e59600/fudilokudipetugatida.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34853195-4b22-4b29-b9ea-b39e2ca4e450/f1_rules_changes_2021.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b38d75b-3889-469f-a760-2806ccc7afa1/36969134921.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f276.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF276 3348 bytes
SHA-256: 7714017500a48669c3db8fe0c21204c01689ec3b63e64dbec6735fe0155dab5b
font_01_sfnt_off0000fe74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE74 5340 bytes
SHA-256: fccc95709de460e165922d43f93af09df4417dd1ff532051add18d7a180b2d7e
font_02_sfnt_off00011093.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11093 12724 bytes
SHA-256: 446b6718caf03b4a8e2d657a6efb5df1cc7abcec89e87d5621d3b3e1247b18c3
font_03_sfnt_off00013c01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C01 16160 bytes
SHA-256: 71fec8a3adfe41455811528c654ef740a0d97889ddd19e39e153b04b7507b7f0
font_04_sfnt_off000150fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x150FC 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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