Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fb9019d13c970d8…

MALICIOUS

PDF

58.6 KB Created: 2020-12-13 15:50:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 063aeef227efc5aa0e1782f4403937a7 SHA-1: 86095de8cb0f0a0590ef193664d5913893489168 SHA-256: 1fb9019d13c970d88ac97ff58f7a0daed579b3e1cc0db363a74245f01bdd3276
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to suspicious or unknown domains, indicating a link farm designed to redirect users to malicious content. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' specifically flags a URL leading to known malicious redirector infrastructure. While no scripts were extracted, the structure and embedded links strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://ggtraff.ru/wb?keyword=batho%20bana%20ke%20bana%20song In PDF document text
    • https://ratowoxure.weebly.com/uploads/1/3/4/5/134584599/bumejevogi-kibenefozo-rejeri.pdfIn PDF document text
    • https://litizabege.weebly.com/uploads/1/3/4/7/134713043/sitir-jaxexi-sitigeziresawa.pdfIn PDF document text
    • https://noxerurivago.weebly.com/uploads/1/3/4/7/134767941/dejibopefuxaz-xuxere.pdfIn PDF document text
    • https://kikipaniwuno.weebly.com/uploads/1/3/4/7/134714830/lepovikanomu-weterabevaf-zolopotaref-todowugox.pdfIn PDF document text
    • https://misutinulil.weebly.com/uploads/1/3/1/4/131407711/mepuxotu-bowukapubisoriw.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/3d4da99f-5bdd-4612-8bff-63e7617dc8b5/baziniditaresuwilim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f94c031-619c-4691-9355-2892d502a02e/the_art_of_analog_layout.pdfIn PDF document text
    • https://s3.amazonaws.com/pexodugosa/tixura.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eaafaabb-af9a-45d3-aada-a9290c0000a2/47978134187.pdfIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/annabel_lee_poetry_analysis_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/lefemijip/ruwodelewunabimelon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/198becaa-d4d3-483e-866a-b86261317f9e/dapaves.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_off0000a99f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA99F 5072 bytes
SHA-256: 9c74d394d0fb227986f7e93906e91d21bfbda86be002c27e02ced41dff080a5b
font_01_sfnt_off0000bae4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAE4 10328 bytes
SHA-256: 96ef13a88ad8a37a8ec17cf8b1208b4844d3a660c5402ddf948ad7898cedf8f0

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