Malicious PDF — malware analysis report

Static analysis result for SHA-256 277988237921f103…

MALICIOUS

PDF

78.2 KB Created: 2020-12-14 16:57:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: f81677b243d7d98a43925dd7a662036c SHA-1: d74127f0c396a64432ac5432a01991c2150f685e SHA-256: 277988237921f10304cdeb9b26ae0d520c47e5b88e895e357ef4a39259904a0f
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://trafffi.ru/strik?utm_term=eternity+vault+swtor PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4381098/normal_5f8d1d86bc7c1.pdfIn PDF document text
    • https://pidadilux.weebly.com/uploads/1/3/4/6/134666204/lafomu-fowesutom-dabikituduxun.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451929/normal_5fc15657c5633.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/bffef9a6-be00-4091-867f-ae1690c6b885/serorepago.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6485be2fce462bcb09523/t/5fca1c944e3f3d2517436038/1607081109561/lego_legacy_heroes_unboxed_apk_android_oyun_club.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38b259ae-a735-4941-a9eb-e9240ef94bbf/nafevum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2e30537-6677-455a-9308-bdecb3f67f6a/angel_stone_hack_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/280f414f-765c-4372-a65e-4c4f652f5166/xovexezexilelino.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bfb28f7-3935-40d6-b77c-bb8842aaa50c/sajujukivaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a06fa299-5d68-4818-add4-d92da5ae6db3/the_unit_circle_table_of_values.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/296941c6-ccd9-4e36-a0c8-249aec0fde62/51238446737.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc3c1c3bd14ff0dd2ae6766/t/5fc4f0393f75b166436eb74b/1606742073995/woodlawn_baptist_church_lowell_nc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9902055e-284a-41e1-8e1e-6416151369fb/sakemarebenigeg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/886c282c-a78b-4c87-a493-09b59d54184a/affect_vs_effect_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7a7e84e-c00c-454e-919f-47f550238986/wafudugeluv.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_off0000f737.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF737 4888 bytes
SHA-256: 2f05b3677c7fc4c5afa83dda994ee0ba2655a6d3e7295ae301fcea97bb0808e3
font_01_sfnt_off00010801.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10801 10472 bytes
SHA-256: f700e2a4937f6ef63aee16e5ced6ad8ce14228f93b6e3bcf0e0064e92dea91f4

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