Malicious PDF — malware analysis report

Static analysis result for SHA-256 180b598c55901e33…

MALICIOUS

PDF

78.8 KB Created: 2021-03-15 00:14:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 3a788423856faa15c2f3af68ad4f4339 SHA-1: 1ac2560646de7efe4a39ee3ca0f64778b967fa2f SHA-256: 180b598c55901e33ad303e7cb37c259025a86504c72dae3041d01965121d0e35
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-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://druttle.ru/award?keyword=iowa+math+test+6th+grade+practice+pdf PDF link annotation
    • https://zowukabizuvor.weebly.com/uploads/1/3/1/6/131636697/bafoxidusanokiriwaz.pdfIn PDF document text
    • http://fulusixavopowem.iblogger.org/46841111965.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465277/normal_600912db77998.pdfIn PDF document text
    • https://luliguruj.weebly.com/uploads/1/3/4/8/134879099/6577509.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459325/normal_601c943782cdf.pdfIn PDF document text
    • https://puwulafu.weebly.com/uploads/1/3/5/3/135329465/nakaluzogul.pdfIn PDF document text
    • http://xipelosowux.22web.org/45430700802.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/faluzotixupi/mastering_biology_answers_chapter_5.pdfIn PDF document text
    • https://s3.amazonaws.com/fikuvine/snackbar_import_android_studio.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd57a4a2-87bf-45a8-98c3-2ede9a0df6bc/xijef.pdfIn PDF document text
    • https://02314edc-d025-420b-9d62-795437f25c47.filesusr.com/ugd/4f0fc1_fdaf26fff19345198dcc9354f6e79ea1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vukumesoj/82364085199.pdfIn PDF document text
    • https://ae26bae5-b1f3-4fb2-a0ba-5d2f2d23988c.filesusr.com/ugd/aec2ea_9dbb0e62e82b4a8bb8e9929edba2d1f1.pdf?index=trueIn PDF document text
    • http://botusomiwa.epizy.com/27491844134.pdfIn PDF document text
    • https://3437305d-a3f4-4f94-9a63-846dd410f5be.filesusr.com/ugd/ffe76b_17cd97cbf8ce4f0fa1c9c83240c8d2bb.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d2f5ca8-0ae4-4275-8c3c-e3275647f1b8/11469763649.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8843fb82-d3da-4fcf-bd2d-34c3f76089c3/d_and_d_building_fabric.pdfIn PDF document text
    • https://770cee9b-59ea-4c2b-ae8d-aad83b0abb79.filesusr.com/ugd/8b25c7_cd8e79f7deef41b083de0bdec786f4ac.pdf?index=trueIn PDF document text
    • https://bb491b24-4c81-4ccc-8daa-bf1baeb171c2.filesusr.com/ugd/93c935_6581f27ed06f4b32a40bdeb483e6708a.pdf?index=trueIn PDF document text
    • http://xunawikavamenu.epizy.com/93219951420.pdfIn PDF document text
    • http://zobawukesilebaf.epizy.com/plural_and_possessive_nouns_worksheets_6th_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/faxaxos/5062452513.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_off0000f39b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF39B 5720 bytes
SHA-256: 6b91f3a58d7b8f77f1c7b887efda7210f834260f6750f5a7ab4b2f094fdb6ad0
font_01_sfnt_off000106fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106FB 11272 bytes
SHA-256: 317e29c3021d4b49d9c5a1c802e39df093795dc6a332610e7b63a32b46dc09ed

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