Malicious PDF — malware analysis report

Static analysis result for SHA-256 df28f02294381c18…

MALICIOUS

PDF

72.6 KB Created: 2020-12-20 19:22:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 8840944371e2360eab0c689a79d6ba52 SHA-1: 145e6a4f55e56d2718dcf15ed24de26040f578b0 SHA-256: df28f02294381c182c0b46a8f011b98a1cdf2b88ccbf3793bbb978723052f438
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. The file embeds a large number of external links characteristic of an SEO link farm, routes users through malicious redirector infrastructure and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://traffmen.ru/123?utm_term=falling+sands+fast+2 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4407306/normal_5fd68c94cbd8c.pdfIn PDF document text
    • https://wexegupewafux.weebly.com/uploads/1/3/4/4/134443826/7bd969a5fe927.pdfIn PDF document text
    • https://watoniworawi.weebly.com/uploads/1/3/4/8/134871767/33b2bad3c59fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375077/normal_5fd37bab81874.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403952/normal_5faad8b94b4aa.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/limepusotanal/14322360662.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd116df6f5f91feb6f99d3/1606226285811/alcohol_to_alkene_reaction.pdfIn PDF document text
    • https://s3.amazonaws.com/gupawupigawono/is-_100._b_fema_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/sajezife/sosozizumebanitodifatoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19bc22c6-3d54-44d2-b9fe-1ec0bbbb4e9d/gobobiporuka.pdfIn PDF document text
    • https://s3.amazonaws.com/fovezewi/conditional_grammar_worksheet.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_off0000e019.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE019 5064 bytes
SHA-256: 5e10546e6f22d094c959b95760f1a2ac02b2470e46ebc7cb45c573774b60577b
font_01_sfnt_off0000f170.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF170 10692 bytes
SHA-256: ed26bc8530445e6568131471fe44729f1b0103635900d6a807ca845bb67ce612

Open this report in the interactive analyzer, or submit your own file for analysis.