Malicious PDF — malware analysis report

Static analysis result for SHA-256 159a46f3d8ad01a6…

MALICIOUS

PDF

78.1 KB Created: 2021-02-02 11:59:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: a947c0b0fc454d0791f21d7ec118d9d4 SHA-1: ba27844b1ec9afa89cbee504df942239400630ec SHA-256: 159a46f3d8ad01a6f856f1b994ee085e8fa8637d61bc793edc0e797d2479a434
116 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The sample was detected as malicious by a ML classifier and ClamAV, specifically flagged as a phishing trojan. The 'SE_CALLBACK_LURE' heuristic indicates the document's content is designed to trick users into calling a phone number, a common callback phishing or tech-support scam. The embedded URL, https://maypoin.ru/aws?utm_term=icegate+boe+report, is likely part of this phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://maypoin.ru/aws?utm_term=icegate+boe+report PDF link annotation
    • https://cdn.sqhk.co/fumamimed/jjwjbid/jerumozutotulifelegun.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372696/normal_5fde20a2962e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453329/normal_5fe8a8b77ba9d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418370/normal_600c76ab49a97.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490116/normal_5fcdc623d364b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422643/normal_5fceda782b474.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459791/normal_5fcc8ec8aa8d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447276/normal_600f569e449b7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478951/normal_5ff2803f9e762.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452386/normal_6015328e33694.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368956/normal_5fd7a44ea8930.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369788/normal_600101aa47dd5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4428331/normal_5feb52d89fae3.pdfIn PDF document text
    • https://cdn.sqhk.co/sazalevimit/hbggihI/online_crossword_puzzle_maker_interactive.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/niporofez/cancer_de_mama_en_venezuela_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/sefabe/quizlet_apk_ios.pdfIn PDF document text
    • https://s3.amazonaws.com/mozirolinitaje/bawara_mann_tarse_re.pdfIn PDF document text
    • https://s3.amazonaws.com/zupenafud/44506463752.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_off0000f3cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3CB 4968 bytes
SHA-256: 01de260644c99d5b838f85234fb6bd2c4212edee74e28684b9dcd698b062f12a
font_01_sfnt_off000104c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104C3 10868 bytes
SHA-256: 54fff0a97961a2cca60f71bb0ce31f5f8f6b33b2d950ccee24c8b3a163d8dc0b

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