Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2daed0f9da3ca26…

MALICIOUS

PDF

66.2 KB Created: 2020-11-23 02:09:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 024af486a2dc4ef3cedc35fd10bac469 SHA-1: 477c04a2673ef955fa48a3de033f0e1efc08c1a1 SHA-256: a2daed0f9da3ca266fd373ae151fa027818f64a6367bcbc97b0abe3a3f0b17f7
222 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious intent, including links to known malicious redirectors and a link farm. The ML classifier also strongly flagged this file. The presence of a 'download button' lure suggests a phishing or social engineering attempt to trick the user into navigating to malicious sites.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://cctraff.ru/123?utm_term=how+to+get+to+elba In PDF document text
    • https://pedomolakikivo.weebly.com/uploads/1/3/4/4/134440841/07b40f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366042/normal_5f8b179865fc3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377114/normal_5fb84720ad050.pdfIn PDF document text
    • https://vepezifu.weebly.com/uploads/1/3/4/2/134265798/3643155.pdfIn PDF document text
    • https://lorebigida.weebly.com/uploads/1/3/4/3/134377432/3cf439a61fa15e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389606/normal_5f932b7694185.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374522/normal_5fa8e49cb5fc7.pdfIn PDF document text
    • https://kugodago.weebly.com/uploads/1/3/4/4/134491336/vozetovuxukelul.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484624/normal_5fa94994ef050.pdfIn PDF document text
    • https://paxavolufogese.weebly.com/uploads/1/3/4/6/134600391/pebifuma_tapivofaso.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c9f2166-7648-4b17-b20a-a3e3c93a6b4a/45848221833.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/305de21a-da0f-4be9-a3b5-304f07079bf7/tamumabutore.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1dca30fe-60cf-4313-acba-01c77dc37641/60788620267.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_off0000c841.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC841 4772 bytes
SHA-256: 091fa7a11116be1f4a8785be9dc05dd58aeea1b333d2da02e68ece8430dac8be
font_01_sfnt_off0000d8a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8A9 10864 bytes
SHA-256: 691141dcc772d299446cf4701aeeb6e37443295565ea8735672694619d98f08c

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