Malicious PDF — malware analysis report

Static analysis result for SHA-256 616a02ae7d5d37c4…

MALICIOUS

PDF

71.6 KB Created: 2021-02-15 23:55:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 0a83841c9859c256038ec66a58bbf4d1 SHA-1: effa9fb1fadfd732bb4c0a7c4fcfb3cc3d90e101 SHA-256: 616a02ae7d5d37c4946a1764f9baed9e16912ec6e39a4d6d7ea2d269e5a0fd8a
214 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and a machine learning classifier, indicating a high likelihood of malicious intent. It contains a large number of embedded links, many pointing to unknown or potentially malicious domains, suggesting a link farm or phishing campaign. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment.

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://yafferge.ru/123?utm_term=what+is+the+top+rated+water+softener In PDF document text
    • http://carinsusa.info/aromaticity_in_benzenoid_and_non_benzenoid_compoundsrtpv3.pdfIn PDF document text
    • http://gratoramaa.website/lipid_profile_definitionn0w1a.pdfIn PDF document text
    • http://lesagotefawa.22web.org/baldur_s_gate_enhanced_edition_free_pc.pdfIn PDF document text
    • https://gawozigojuvapa.weebly.com/uploads/1/3/4/8/134896601/gigilevawevef.pdfIn PDF document text
    • http://rostov-mobile-doctor.ru/3540025302ekiuh.pdfIn PDF document text
    • http://stingeksoj.online/42656128431nkneq.pdfIn PDF document text
    • http://avit0.cc/ogden_utah_mapf4jz6.pdfIn PDF document text
    • http://romeita.space/edit_text_in_on_ipadkpx3v.pdfIn PDF document text
    • http://nogivubuleduwi.22web.org/catholic_songs_free_tamil.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/napisakaluja/tratamiento_de_alveolitis_humeda.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/62483070544.pdfIn PDF document text
    • https://s3.amazonaws.com/nefomojuwet/rixinuzilirulolitevorere.pdfIn PDF document text
    • https://s3.amazonaws.com/votuweroxigezog/describe_your_personality_interview_question_answer.pdfIn PDF document text
    • https://s3.amazonaws.com/fuzafuzeruwit/cute_cat_hd_pics.pdfIn PDF document text
    • https://s3.amazonaws.com/baxekojojexusol/vw_vcds_free.pdfIn PDF document text
    • http://wufofot.rf.gd/java_aptitude_questions_and_answers.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_off0000dbbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBBD 5204 bytes
SHA-256: c64f6797a3cee553ca406e23d5dccbaa0533aa108bd63df9732d17664dd25404
font_01_sfnt_off0000ed84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED84 10540 bytes
SHA-256: 670507ed54d74f3a1fea2bfa1e3c198beef688136610deb583e27a2fc332f040

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