Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e2a4a227ca85483…

MALICIOUS

PDF

90.6 KB Created: 2021-04-03 05:08:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: be9a5db86dbb7bf43c98b5198ff1da47 SHA-1: ceffa7615c345e30ae8f491c3c35a6c03abddf3b SHA-256: 5e2a4a227ca85483d27d00e09f679d144e7035b550e3f5e48acc52fc707156b7
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a lure to download a second-stage payload or redirect to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://kuzutuzo.ru/wix?keyword=irobot+roomba+user+guide PDF link annotation
    • https://cdn.sqhk.co/rodesedaded/jemFggu/33003336725.pdfIn PDF document text
    • https://cdn.sqhk.co/pigevikuwi/id0gghb/ball_shooter_for_dogs.pdfIn PDF document text
    • http://zupanito.iblogger.org/pusab.pdfIn PDF document text
    • https://cdn.sqhk.co/mivezifov/hiQij9q/42696382077.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://uploads.strikinglycdn.com/files/44ef04d0-2279-467e-b68c-b8e35b36d2fa/56758202725.pdfIn PDF document text
    • http://dujisuga.epizy.com/53477789350.pdfIn PDF document text
    • http://kipalinuki.rf.gd/wafodumavafebusabufogeli.pdfIn PDF document text
    • https://48e4e0df-78ce-4736-8797-27735e68dc67.filesusr.com/ugd/f3b179_28c50de88be74873af05ab01f2767aa9.pdf?index=trueIn PDF document text
    • http://safilizejodi.epizy.com/goredibenejojet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79731083-9a8c-4a41-81df-5663d7f21b77/jelobakefaxin.pdfIn PDF document text
    • https://b9eb3541-094c-4606-b101-17c2291fd6e1.filesusr.com/ugd/a18601_5fc083d550b342f3b8cef54e7ac22c17.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7db508f-40b6-4f8b-ad89-8b489a7ccdce/41144858905.pdfIn PDF document text
    • https://3dcfbd4a-ef33-49dc-a04a-0aaf5307c30d.filesusr.com/ugd/b47706_a1224bb67e624ff287d881d7230c530e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/17a63877-bf32-4e4a-ae47-702911199d1f/47825297773.pdfIn PDF document text
    • http://tuzoxizusuzu.epizy.com/22485279723.pdfIn PDF document text
    • https://9a60fab3-6fb0-4be7-9305-b2e3cc44d963.filesusr.com/ugd/811c4f_76497e2ce9264c6c9428733ee55b1803.pdf?index=trueIn PDF document text
    • http://votanekojemuxu.epizy.com/football_manager_2016_database_editor_download.pdfIn PDF document text
    • http://guvetevuvov.epizy.com/83466007006.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://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dfd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFD0 5260 bytes
SHA-256: 3a1f269f536bdcecbcd307c8afd1ba148a709c809e28e5389e9ec7b3d8ae1221
font_01_sfnt_off0000f258.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF258 5188 bytes
SHA-256: 257f73241e1aa2827b75c0cfb763541f9349c287ae5689a8f86e1675a7d9e27c
font_02_sfnt_off000103d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103D1 6640 bytes
SHA-256: eca62b72654736461a635ba366d09d794777fd95c58152d2b251becdfce657e0
font_03_sfnt_off0001156e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1156E 14996 bytes
SHA-256: 481c1579694c4cfdf9f8d1bcee7552b1d85dba15701fd5ae26e28c271ae3b3ab
font_04_sfnt_off00014240.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14240 16960 bytes
SHA-256: 9aff4d01565023664095c8a3724de5ba070fdd511e5562a92af14f6595c64456