Malicious PDF — malware analysis report

Static analysis result for SHA-256 604a192d75509212…

MALICIOUS

PDF

71.3 KB Created: 2020-12-17 20:26:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 61e32ffa6506e51c63231dc74742bc99 SHA-1: 98810547e46c054c3f59b3d2da0d1b52d89dc699 SHA-256: 604a192d75509212305afe89d63b2fd06f5a66fb203ee9be98890a4847f0a9bf
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The sample is a PDF containing a large number of embedded URLs, with one identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of numerous external links suggests a link farm or phishing attempt, likely delivered via spearphishing attachment.

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/123?utm_term=the+division+survival+guide+locations In PDF document text
    • https://lasapiboxemifol.weebly.com/uploads/1/3/4/8/134865682/7823603.pdfIn PDF document text
    • https://xilamebi.weebly.com/uploads/1/3/4/5/134598653/ccacf0.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/dubiditiginowo/age_of_empires_mobile_mod_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/mubefula/genie_gitr-_3_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/566843ee-824a-4e8c-b816-c57e800c0d30/18188895562.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4accabcf-c7aa-45f1-acdc-878781e46b0f/lolufuvukegoxeji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f36f53d9-feff-4f0f-8f16-326a564cfcf0/68798831963.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf8f02c6de34c7a38831c/1606220021329/gamukogujiro.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f24c403f5353fd95fd42/t/5fc9a1ea8562787517561439/1607049708436/nakemanitumovunog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23bc2c54-0dfb-4192-8284-1fdeb7b32611/defifuxonafipilozefu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdef48a97599144ebc7cd2/1606283080466/pokemon_delta_emerald_mega_stone_cheat.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_off0000dad0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAD0 5208 bytes
SHA-256: aff9ce4814f482372f8746f6f66684190f956fff154cd64886601a35c3c511fb
font_01_sfnt_off0000ec88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC88 10480 bytes
SHA-256: fd514ac27abc08c4d563803068ac413e63cbcfbef60d8b90e92e4a6e0483bedb

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