Malicious PDF — malware analysis report

Static analysis result for SHA-256 1aa573b2a4429454…

MALICIOUS

PDF

83.1 KB Created: 2021-05-01 19:22:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 7e8bd62d69af8acc47ef8ac03dcbec89 SHA-1: 0103f388755adde6be45b75e8c1ed120b4079b9e SHA-256: 1aa573b2a4429454995ec723167059afc4a655f3b142866329b93d6bd7ddcf18
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://dafemum.ru/strik?utm_term=percy+jackson+sea+of+monsters+plot+summary'. This indicates the document's primary purpose is to lure users to a potentially harmful website. The ML classifier and ClamAV detection further support its malicious nature, classifying it as phishing and a Trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://dafemum.ru/strik?utm_term=percy+jackson+sea+of+monsters+plot+summary In PDF document text
    • http://luxisulejoxo.getenjoyment.net/syma_helicopter_wont_charge.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488604/normal_6067338f36f65.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387241/normal_5fca5b463a743.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417413/normal_5fcb4a46ae9dc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369174/normal_6007aba7f0d96.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456372/normal_5ff26c2d1b05c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452374/normal_5ffe544a8be1b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380086/normal_605284322e751.pdfIn PDF document text
    • http://mevukavotidu.getenjoyment.net/67326340340.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408719/normal_5fc8b89883e93.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460466/normal_5ff8642ba7182.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402710/normal_60120e4f32ff5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://disoluje.myartsonline.com/sujets_brevet_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/kezemiradigu/nadelome.pdfIn PDF document text
    • https://s3.amazonaws.com/woxewiwupir/zalobenano.pdfIn PDF document text
    • https://s3.amazonaws.com/woxojuxafopuv/possible_visa_interview_questions_and_answers.pdfIn PDF document text
    • http://tobesonev.rf.gd/apollo_11_facts.pdfIn PDF document text
    • https://s3.amazonaws.com/dowadotiju/32934096319.pdfIn PDF document text
    • https://s3.amazonaws.com/nuvukivaxiren/nolizif.pdfIn PDF document text
    • http://xexibok.rf.gd/telecharger_la_boite_a_merveille_gratuit.pdfIn PDF document text
    • http://pulitisagot.atwebpages.com/tababalamusepojixujer.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_off00010719.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10719 5404 bytes
SHA-256: d6d798ca517a4d76cb9f3e2c213a6837bffadf181d166f4412b145f063921717
font_01_sfnt_off0001197e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1197E 10968 bytes
SHA-256: 70a6de52fc3988ccc623d997afd4364a4c554387e3a622c6ea0bd94188dc4055

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