Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab4409db4f5a1cb2…

MALICIOUS

PDF

74.4 KB Created: 2021-02-21 04:06:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 29114c1dcf15275a07ead6c24686adf9 SHA-1: 9b4cf410c44a1f9d02f1f65959abd6a8d2336eb5 SHA-256: ab4409db4f5a1cb2990ac857febe3a110ad242a8516f87eee785cfab0212542a
96 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The embedded URL, disguised with seemingly innocuous text, is a common phishing lure. Although no scripts were explicitly extracted, the PDF format and the presence of embedded URLs suggest potential for exploitation or redirection to malicious sites.

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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://leonvi.ru/123?utm_term=the+other+side+of+the+door+taylor+swift+lyrics PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4369487/normal_600918ab6245b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469358/normal_5ff3fc70dac3c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392199/normal_5fde2b2388a8f.pdfIn PDF document text
    • http://qupieasy.online/hinge_girl_answersynjpz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373508/normal_6031926638b47.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462351/normal_5ff1eb5f4eaea.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455179/normal_5fcce5f3e9289.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444649/normal_6015c13dbfd25.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420612/normal_5ffff11ad0374.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371505/normal_602946a89a86d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381766/normal_5ff03adf93d98.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/remuv/angry_birds_epic_offline_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/poguvelefa/64062518974.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d6a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6A8 4932 bytes
SHA-256: 055fe84c9c5d1011c1a0def2cc54741e222efb65c5b19ae5f7358a2be761bb1b
font_01_sfnt_off0000e79d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE79D 11412 bytes
SHA-256: bb9ac4c29f9c5f11133bb23f152f220ee68e9e46f24408bbc60d150a5f8674d2
font_02_sfnt_off00010e6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E6D 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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