Malicious PDF — malware analysis report

Static analysis result for SHA-256 92a82e85e6728b17…

MALICIOUS

PDF

69.5 KB Created: 2020-11-30 11:16:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 0f1e1fb1436df847ed303cdcbe2cdfa8 SHA-1: 96a2a4e24bb7ddcdf4e1cbc1f00b59942e00f709 SHA-256: 92a82e85e6728b1770716f224aa0bda85ee4ee9690aac9b110d3a06860bfd789
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-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://traffnew.ru/strik?utm_term=kobalt+miter+saw+parts PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4374520/normal_5f89b637f0b32.pdfIn PDF document text
    • https://zufuvedowenekoz.weebly.com/uploads/1/3/4/8/134861022/kusewetulurixisogoj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374976/normal_5fa4c400c492d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd22c2634219316b33b6e5/1606230723308/apk_hill_climb_racing_2_soldi_infiniti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/707f5327-fddb-46e8-b758-0abd200f4cbb/jomitatilenuxizinedijewil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9d85f1c-3167-4b77-879e-82b48a214dc6/dynasty_warriors_strikeforce_2_psp_iso_english.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc18dc424b06a7eb303d081/t/5fc397403485235c8635430c/1606653761485/edward_abbey_quotes_may_your_trails.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdf011e6d49a06bb562cbd/1606283281924/paul_bloom_against_empathy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4728a04-e706-458a-84a7-577c10c07429/36471382570.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/72307604334.pdfIn PDF document text
    • https://s3.amazonaws.com/najubu/miya_bhai_song_pagalworld.pdfIn PDF document text
    • https://s3.amazonaws.com/matogapibelifiv/38279583721.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4617c9ca-eef3-4072-abfd-441b0d238212/vodoxofofefumadamuselorum.pdfIn PDF document text
    • https://s3.amazonaws.com/widetunipet/2190347674.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d44a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD44A 5168 bytes
SHA-256: e7d2869cb8f4b5e19d9cb3c2098b3334f0ad8435f39c3ca100cad273c34f3f2b
font_01_sfnt_off0000e5d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5D6 10380 bytes
SHA-256: 60e595a017b5c79c7f0705fd3fd717f6cd7507a62ab26827c4ad207fb2cd5b14

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