Malicious PDF — malware analysis report

Static analysis result for SHA-256 0980f433b7797542…

MALICIOUS

PDF

79.7 KB Created: 2020-11-11 22:54:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: c3d16fc3ec3d4db0ec13e4a6e2326361 SHA-1: 922cbe4bb877ced046bfae7b6320019479575313 SHA-256: 0980f433b7797542cf8d4fd439d0f7db15632b6decce6632149453d2a1bb4381
214 Risk Score
Tags
free-cdn-ebook-manual-lure

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 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 0.9997

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://gettraff.ru/strik?utm_term=rimworld+best+crops In PDF document text
    • https://besuxape.weebly.com/uploads/1/3/4/3/134374749/18b2d0999e4.pdfIn PDF document text
    • https://romesezex.weebly.com/uploads/1/3/4/6/134605020/sutavebikaw-donulojema-zibafonizafike-dozapaxakul.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371240/normal_5f8c03ad6925f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383566/normal_5fa47df6e9b5c.pdfIn PDF document text
    • https://wopeduvolevim.weebly.com/uploads/1/3/0/7/130776212/kotesizuteso-suberigirutu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464078/normal_5fa6b74338b70.pdfIn PDF document text
    • https://walijogopabo.weebly.com/uploads/1/3/0/7/130776167/gikuwanuf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376099/normal_5f8f15bd36c3a.pdfIn PDF document text
    • https://tapuroxoj.weebly.com/uploads/1/3/4/5/134599682/tiboluxojapuxu.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/defujo/advanced_english_vocabulary_test.pdfIn PDF document text
    • https://s3.amazonaws.com/kibavutibeved/95777946469.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_off0000eeac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEAC 4932 bytes
SHA-256: 6eff8ee142c0200cb2ec01d5b61cd9e8a3976e05c03cf18715a78ce00ac65bb0
font_01_sfnt_off0000ff83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF83 10640 bytes
SHA-256: 1c40e246311685bac3346f69ffded97753de00c4d845a617b664890ed1524abd
font_02_sfnt_off000123f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123F8 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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