Malicious PDF — malware analysis report

Static analysis result for SHA-256 17b0a5a81845c58c…

MALICIOUS

PDF

85.5 KB Created: 2021-05-26 05:16:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: ac1ef4257cdab20576b45af2d66c9d1a SHA-1: de389d6b42ee16fcc5ef1ba13ca03de6eb8c6ed1 SHA-256: 17b0a5a81845c58ccf3cce3dcbaa223c3d7553e22904b1af861add67b0863af3
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 0.9991

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://jottigo.ru/strik?utm_term=descargar+musica+cristiana+de+avivamiento+mp3 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4490746/normal_6057c9683ee36.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449603/normal_601603df2d311.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491925/normal_5fd9c80157bfb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411919/normal_60621d7e63b6f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454550/normal_5fe3872e360a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450428/normal_604656d265620.pdfIn PDF document text
    • https://jinijazi.weebly.com/uploads/1/3/4/6/134668286/kesawojoguwatukozon.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365639/normal_5fefa852cb6b1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405904/normal_5fe3966c8e97e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4528959/normal_5ffd6017c17c5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387040/normal_5fdfceab07188.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488135/normal_603002e22e1ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391605/normal_6068a9fd19e1b.pdfIn PDF document text
    • https://jozufibajas.weebly.com/uploads/1/3/0/9/130969385/rutojani.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449603/normal_60014fc937331.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/xuzed/lisobagidak.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwawibu/35389330355.pdfIn PDF document text
    • https://s3.amazonaws.com/bokexizometun/16863292010.pdfIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/twisty_noodle_winter_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/zowejunef/46181114087.pdfIn PDF document text
    • https://s3.amazonaws.com/fomudebipefasu/nepitar.pdfIn PDF document text
    • https://s3.amazonaws.com/waxegatulo/segarigo.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

Related samples 4

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

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED30 5584 bytes
SHA-256: 88f994c4d977956bf51a0fb32697a32f87f3e45999219baf0c6399117219a56c
font_01_sfnt_off00010025.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10025 2332 bytes
SHA-256: 791ce02c6b0d71ee5d9cfa09815bdf9fd253b9648e0caf1d779d6ba09755164f
font_02_sfnt_off00010ab6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AB6 12580 bytes
SHA-256: 26c9a7ae294db4151304afbe257406b4435e5ed0eb23cf24895ce3a137f2b1b9
font_03_sfnt_off000132f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132F8 16088 bytes
SHA-256: 517e535115b97ee4a7098dc5e43584fe8c2d282143f7c7588c846bc4c7e03a96

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