Malicious PDF — malware analysis report

Static analysis result for SHA-256 18669b91c4194e62…

MALICIOUS

PDF

81.4 KB Created: 2021-04-28 07:08:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 5913eefb946229a356e561f109e482cb SHA-1: f579b8231fb7d72aabb8ce586263a9a485bb558b SHA-256: 18669b91c4194e62046e67ea8811a5707ef0a5495bb462d2bea942f5358d07d0
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains an embedded URL pointing to a suspicious domain, which is likely part of the phishing lure. The document body, though partially corrupted, suggests a pretext of providing a product manual to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jacksth.ru/strik?utm_term=eureka+enviro+steamer+370+manual PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4416149/normal_5fdfc74f04365.pdfIn PDF document text
    • http://wudenufodoroziv.scienceontheweb.net/13306611587.pdfIn PDF document text
    • http://gekifek.scienceontheweb.net/samsung_wa48h7400aw_a2_parts_list.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446401/normal_5ff81166b781b.pdfIn PDF document text
    • http://kenugizi.getenjoyment.net/20589187543.pdfIn PDF document text
    • http://lenugaguv.medianewsonline.com/demigods_and_magicians_book.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390329/normal_605b9a6809995.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499629/normal_5fec4351c5124.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/suzixegazunow/beginner_pilates_reformer_classes_near_me.pdfIn PDF document text
    • https://cf075d60-af7c-4c71-a16c-5c8c125a9bb7.filesusr.com/ugd/cc03df_2ed146e4c10a486da6d8801240446d65.pdf?index=trueIn PDF document text
    • https://e222b685-7c7f-4cee-b050-218328c89257.filesusr.com/ugd/c0232f_0266efd2ec224562a0b07122fa645e9f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zatazewoz/xojuk.pdfIn PDF document text
    • https://s3.amazonaws.com/nilititonawafim/asfixia_perinatal_gpc.pdfIn PDF document text
    • http://mekasesajiw.onlinewebshop.net/shatter_me_meaning_in_english.pdfIn PDF document text
    • https://11e0ccb5-01dd-4757-ae93-f6f3b4f5ca32.filesusr.com/ugd/1a2ce6_15378edbb341441f82d3ebc90254bc91.pdf?index=trueIn PDF document text
    • https://3794eb9c-cc8b-492c-aecc-44533f76aaa6.filesusr.com/ugd/1ee69b_4c8aae34c6434b0783609bedf2d93c7a.pdf?index=trueIn PDF document text
    • https://aa4c2489-c93b-4667-afab-104bf5323bad.filesusr.com/ugd/8b49c6_04cd6c69505e4ca1b2e27fdc3e0ef3ce.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ba93cc7-96d9-45a7-8adc-f55ead551c7b/84708895146.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb1b1270-5313-44b0-a552-fe9dc3efd06e/13007283611.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31c403b3-83af-4d6b-b71b-1c5f2288e570/99703758945.pdfIn PDF document text
    • https://s3.amazonaws.com/titugome/nibuvixipe.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_off0000f0f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F7 2996 bytes
SHA-256: b86b009826b48a0820dd69ad864dde0ef4fc693d4c2f12e2cb8bf7d88a9c7aa2
font_01_sfnt_off0000fbba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBBA 5300 bytes
SHA-256: f4955d8ef46a12712ba465d59ac7bfe1fe9cada5b4108a16f3925b2525965941
font_02_sfnt_off00010dbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DBB 12276 bytes
SHA-256: c41efed5509e0de52395e1e4bd5cf1141a57429cdd55e61b34ef569283850ae0

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