Malicious PDF — malware analysis report

Static analysis result for SHA-256 35958f7c007a028b…

MALICIOUS

PDF

62.4 KB Created: 2020-11-25 14:59:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 5701ae9d5a708c1cdc784f47a2c4bf06 SHA-1: bcc83f27f9e63627a29f66c71334ee0ae5a93c84 SHA-256: 35958f7c007a028bc59c6cf9ac652ddab00f5dc20044f79e16f6ea613fac6b41
214 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though heavily obfuscated, contains text that appears to be a lure for a "Governed portfolio 6 factsheet", likely intended to trick users into clicking the malicious links.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://cctraff.ru/aws?utm_term=governed+portfolio+6+factsheet In PDF document text
    • https://begumilipanup.weebly.com/uploads/1/3/4/6/134617951/fiveduk_bopotebuw_vedevaja_rifojesesukom.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489988/normal_5fad5925ce319.pdfIn PDF document text
    • https://nigokozop.weebly.com/uploads/1/3/4/4/134436215/7267009.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/wopari/lumber_tycoon_2_dupe_script_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/xisefowu/63619711594.pdfIn PDF document text
    • https://s3.amazonaws.com/wofaxil/mititasobixus.pdfIn PDF document text
    • https://s3.amazonaws.com/wazagidonux/ansible_files_or_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/voxulija/33158962464.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3648cb6f-ec59-40c9-8d5a-c0afab095acb/bagaviwusefatiwolokona.pdfIn PDF document text
    • https://s3.amazonaws.com/tazibabebamep/repejejeguninuvetibiluz.pdfIn PDF document text
    • https://s3.amazonaws.com/vezumobigodub/47760381465.pdfIn PDF document text
    • https://s3.amazonaws.com/xipavir/56282668956.pdfIn PDF document text
    • https://s3.amazonaws.com/wusigipufuvowix/nefufawule.pdfIn PDF document text
    • https://s3.amazonaws.com/vapelurowar/53208634518.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_off0000b4ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4EF 5488 bytes
SHA-256: 59f7108fb3366e70221905062c08586e448ba03f875f2d1dbf02b2a833da65d8
font_01_sfnt_off0000c79f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC79F 10860 bytes
SHA-256: 24b05034afb8fdb7f7049ddd36fe3fbc0f45702ae5f5e58f1d82935636116918

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