Malicious PDF — malware analysis report

Static analysis result for SHA-256 392adbae9ca51761…

MALICIOUS

PDF

72.4 KB Created: 2020-12-23 08:58:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: a0d1d8236c6ce5d644db127ead336632 SHA-1: 971a074bc46c83629fdb594d82174b1a49de7b66 SHA-256: 392adbae9ca51761c030aeadd028bb8b1c7700af1705eb99a6ce3323ffe6e30c
222 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses an urgency-based lure. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://ggtraff.ru/strik?utm_term=fake+call+app+download In PDF document text
    • https://junipupupu.weebly.com/uploads/1/3/4/7/134739756/tajijefisarona.pdfIn PDF document text
    • https://naduwabale.weebly.com/uploads/1/3/4/6/134651235/sujukabosi_penalomemubew_bavokoramorizi_zitibebu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465127/normal_5fab23ea2d1c0.pdfIn PDF document text
    • https://gebigimudixerez.weebly.com/uploads/1/3/4/3/134374499/6138793.pdfIn PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/5650151.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/wixamupelinere/gikamarizonadukol.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc64b09f7cf8c75404f74c5/t/5fd70d84ab1a676c72a584e3/1607929221514/29344306190.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0155a53-e877-4973-8cbd-ea507aebc6ee/tuzug.pdfIn PDF document text
    • https://s3.amazonaws.com/kozibowisenatu/gikipe.pdfIn PDF document text
    • https://s3.amazonaws.com/tibitexil/45881197920.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxutedi/annual_confidential_report_form.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/7185483254.pdfIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/insta_downloader_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/add03c36-d013-4032-9a24-a91d71af7aa8/3563792492.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fde7bb6c954b227390fcd8a/t/5fdefd8ff3f88b619f1844e7/1608449423948/dafuvorapega.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d341.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD341 4564 bytes
SHA-256: 1018b1c083c59d21b822098767a806e05b75c1cca7fef2c09e92801a6e3c5ad3
font_01_sfnt_off0000e2dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2DD 10512 bytes
SHA-256: b316f0fa6c45cec5ed37f7683f395b5b3272c217afa02a58ed41e692d87e2089
font_02_sfnt_off000106ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106CA 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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