Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b9716b704a74736…

MALICIOUS

PDF

74.2 KB Created: 2021-02-11 01:41:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: f8e28f52969fe4afd663a5aeae664a25 SHA-1: 99c22085793855dc4572e99f06820037a40ebb1b SHA-256: 1b9716b704a747367c4d0e812cebefd01c2d749c70398585f7e6e3d9ec5c7c86
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI that redirects to a URL associated with phishing lures, specifically mentioning 'facebook likes app for android'. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of multiple unknown reputation URLs further supports the phishing and potential malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://maypoin.ru/wb?keyword=facebook%20likes%20app%20for%20android PDF link annotation
    • http://pay-order.info/yahoo_for_laptop_windows_7se3og.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408865/normal_5ff81cc5ebca2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481068/normal_601689bfcb3b8.pdfIn PDF document text
    • http://beautysale.site/57493631218djn04.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372383/normal_6016930b1dbce.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500893/normal_5ff4966298d73.pdfIn PDF document text
    • http://btsworld.org/gofukafuburulisadafesitofmbpsw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420906/normal_602169bb80c34.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480736/normal_5ff49a1ea5d6f.pdfIn PDF document text
    • http://shoop-ft.ru/marketing_assistant_cv_template_uk2nlay.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385850/normal_60032dc34e44d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464083/normal_5ff0d48113630.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/juvetaso/simakumikazesuxir.pdfIn PDF document text
    • https://s3.amazonaws.com/jupevuxirapi/629043268.pdfIn PDF document text
    • http://nasewuji.epizy.com/fiboxaraligajegag.pdfIn PDF document text
    • https://s3.amazonaws.com/fidobakipivogit/bombay_tamil_movie_bgm_ringtone.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_off0000d8a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8A9 5016 bytes
SHA-256: e1c119db9998269dbcd89de956f331be3333b8fea9c72dc48a0fee0f2a1665ab
font_01_sfnt_off0000e9ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9AC 10588 bytes
SHA-256: cde65ccfca98c58312f421bb6683f682b44fd52d1c6086074654cd48f39e576d
font_02_sfnt_off00010dd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DD4 4324 bytes
SHA-256: ad623bc7c681097dfa1224999cf6cc6072d3ca9a137655dc1129b0261f0b357c

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