Malicious PDF — malware analysis report

Static analysis result for SHA-256 56193a3932d23431…

MALICIOUS

PDF

76.4 KB Created: 2021-03-02 01:31:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: dc89d93aa7ceb790c99be982647f553c SHA-1: 32dd68106efc89205c921b7f489250e472a87513 SHA-256: 56193a3932d23431218d3bf251645b7ccd43d0a3c4d6da7897a7e87b3dfd2939
156 Risk Score

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://crophysi.ru/wix?keyword=free+resume+templates+yahoo+answers PDF link annotation
    • https://cdn.sqhk.co/nuzitomizaj/ccibzha/89643967185.pdfIn PDF document text
    • https://forerijekakifur.weebly.com/uploads/1/3/5/4/135401119/7739238.pdfIn PDF document text
    • https://bopugokux.weebly.com/uploads/1/3/4/9/134901566/13aae3e9eb31e2c.pdfIn PDF document text
    • https://nodajalij.weebly.com/uploads/1/3/5/9/135990600/7650143.pdfIn PDF document text
    • https://kumigovujubexug.weebly.com/uploads/1/3/0/7/130776874/giwasuvipojulov-vususemixan-deneniduseda-ketutar.pdfIn PDF document text
    • https://belawutuvuzepim.weebly.com/uploads/1/3/4/6/134605506/402171.pdfIn PDF document text
    • http://puxexawug.iblogger.org/la_la_la_free.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/patotale/calculate_roi_template.pdfIn PDF document text
    • https://s3.amazonaws.com/fasomusogapovi/tarazugodara.pdfIn PDF document text
    • http://jaxiwupa.epizy.com/how_to_change_the_paper_on_a_sharp_el-1801v.pdfIn PDF document text
    • https://s3.amazonaws.com/rezugekolaba/chamelephon_apk_qualcomm.pdfIn PDF document text
    • https://s3.amazonaws.com/tugumeb/risk_management_meeting_agenda_template.pdfIn PDF document text
    • https://s3.amazonaws.com/xapijifas/62180235893.pdfIn PDF document text
    • https://s3.amazonaws.com/tometubufimopim/tivejiwezapurinus.pdfIn PDF document text
    • http://bisapejavi.epizy.com/lugobiwipozonibinob.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_off0000e306.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE306 5208 bytes
SHA-256: ae050cea08ec535675d9a6ad18e18d3d708588c642b9d64bbdd6b47f15c88796
font_01_sfnt_off0000f4a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4A3 15176 bytes
SHA-256: cc31d3cb19c7faff7740adfb38c57b60c64d9cfe8b4fb5deba68d7015c6b7a85

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