Malicious PDF — malware analysis report

Static analysis result for SHA-256 85e7f219036e2df3…

MALICIOUS

PDF

75.5 KB Created: 2021-02-25 00:43:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: c90fbd72c6e74da29be4ab1fb4754a1d SHA-1: d8ad771c7a16e0f1518595295f79d3248c1339b8 SHA-256: 85e7f219036e2df3dd8cb2047c33ef3abadeec6e3b51bc12554602e4574cc714
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier and ClamAV also flagged this file as malicious. The document body, though heavily obfuscated, appears to be a lure related to 'pressure airfryer plus', suggesting a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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://yafferge.ru/strik?utm_term=how+to+use+pressure+airfryer+plus In PDF document text
    • https://cdn.sqhk.co/padumaxifop/Kmjdiim/ready_made_projects_in_java_with_source_code.pdfIn PDF document text
    • http://jasazotinalol.mygamesonline.org/bersa_380_safety_on_or_off.pdfIn PDF document text
    • https://cdn.sqhk.co/gedugari/XknhezE/banutefexa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444366/normal_5fcff67f41053.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486363/normal_5ffdc4bf6955e.pdfIn PDF document text
    • http://xulubapatoso.scienceontheweb.net/13768921445.pdfIn PDF document text
    • https://cdn.sqhk.co/jivazufevi/evp2lhc/muxuxavazexej.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392237/normal_5ffabecb3b7e1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447079/normal_5fe179bfe34ba.pdfIn PDF document text
    • http://jeruxawi.iblogger.org/56537654105.pdfIn PDF document text
    • http://viniveba.mywebcommunity.org/63590368685.pdfIn PDF document text
    • http://jekenufakewe.mypressonline.com/71534834012.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/dazifozixawus/11982380516.pdfIn PDF document text
    • https://s3.amazonaws.com/kozewuposoridil/arere_ekkada_ekkada_audio_song.pdfIn PDF document text
    • http://jilevatawew.epizy.com/76376551677.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_off0000ebaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBAF 5052 bytes
SHA-256: 42d88e1f63ecd9bdb94c9b415711202ad99484ba848ed7786c0ea5e769f14bb9
font_01_sfnt_off0000fd04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD04 10604 bytes
SHA-256: 04f2d6ca95caa3b48c7e985d3ce81a4d29820cdcd0e309d7b264667b5554603b

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