Malicious PDF — malware analysis report

Static analysis result for SHA-256 288b19886874c20d…

MALICIOUS

PDF

82.1 KB Created: 2021-02-20 00:40:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 136dce070ce718b465f38691280ec743 SHA-1: 5d86eea9625494923834ce15c6ddf695422d8443 SHA-256: 288b19886874c20d56c1a1c215f257831a5e34136183eb4da00d52ab2ee59691
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many of which are to PDF files hosted on various platforms, suggesting a link farm or SEO poisoning attempt. One of the primary URLs, 'https://bologen.ru/wix?keyword=how+to+hack+empires+and+allies+with+cheat+engine+6.2', indicates a lure related to game hacking. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan.

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://bologen.ru/wix?keyword=how+to+hack+empires+and+allies+with+cheat+engine+6.2 PDF link annotation
    • https://nutukotixirijir.weebly.com/uploads/1/3/5/3/135392142/najugulekavotemoziv.pdfIn PDF document text
    • https://litisenos.weebly.com/uploads/1/3/1/0/131071047/pegidezatugovi-zijifetumo-kumoravepudugir.pdfIn PDF document text
    • https://putojedenavaxo.weebly.com/uploads/1/3/2/6/132683165/41a4d5b60.pdfIn PDF document text
    • http://i-men.ru/bonupumusubamalonizonixhawv1.pdfIn PDF document text
    • http://ca-management.website/career_aglasem_alp_answer_key2t83a.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/jakujakula/25187040726.pdfIn PDF document text
    • https://s3.amazonaws.com/zolerazowubow/google_sheets_api_example_java.pdfIn PDF document text
    • http://tibakofe.epizy.com/filenokanaxamixulafuza.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwenoxuzasila/wild_animal_coloring_sheets.pdfIn PDF document text
    • http://mibofive.epizy.com/zujolefixop.pdfIn PDF document text
    • https://s3.amazonaws.com/daraniwekamidir/please_find_attached_the_duly_filled_form.pdfIn PDF document text
    • https://s3.amazonaws.com/wanalovum/aleister_crowley_the_book_of_thoth.pdfIn PDF document text
    • https://s3.amazonaws.com/wexoteluwag/67588634015.pdfIn PDF document text
    • https://s3.amazonaws.com/tokit/standard_calibration_curve.pdfIn PDF document text
    • https://s3.amazonaws.com/belapawerezuju/belizediziwizegizolunot.pdfIn PDF document text
    • http://jidibavozajo.epizy.com/android_annotation_processor_example.pdfIn PDF document text
    • https://s3.amazonaws.com/midipes/baguruvazegefibisatatajub.pdfIn PDF document text
    • https://s3.amazonaws.com/pusori/rekaworamuwuxiwipa.pdfIn PDF document text
    • https://s3.amazonaws.com/napisakaluja/punctuation_commas_worksheets_for_grade_3.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_off0001038e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1038E 5920 bytes
SHA-256: 20face3355f8ca0037e4557696877a224674fa1abbe49768c3763b4e16ee91bb
font_01_sfnt_off000117a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117A4 10184 bytes
SHA-256: 30b2805b45b11a048aa3934e2de0cd57da9fe91c9ac0fbf77ed4cb7ee6b2eb87

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