Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c8ef8fa922f6c72…

MALICIOUS

PDF

67.9 KB Created: 2021-03-18 04:10:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: c34e189638e4a6e8030e3b3365476dee SHA-1: 5ba36e769b128a73d0180b3d51baf697c4cb932f SHA-256: 3c8ef8fa922f6c72780b5d8d18fdd3cf393ea697ec91d7366b5870b0c0d0d7df
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

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://ponafet.ru/strik?utm_term=stihl+ms170+carb+kit PDF link annotation
    • http://beveram.66ghz.com/english_synonyms_dictionary_offline_apk.pdfIn PDF document text
    • https://towizitubozabo.weebly.com/uploads/1/3/5/4/135400713/7502584.pdfIn PDF document text
    • http://mixutadumekaje.mypressonline.com/how_to_find_radical_in_math.pdfIn PDF document text
    • http://dedotiroviwef.22web.org/bootstrap_form_multiple_sections.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379486/normal_5ffc1c1f9be80.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385217/normal_6052842b57d47.pdfIn PDF document text
    • http://toxaxugepevu.iblogger.org/netflix_apk_for_android_tv_os.pdfIn PDF document text
    • https://sugopubix.weebly.com/uploads/1/3/1/6/131637077/voxoturuxijoma_nibifoga.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370266/normal_5fd1cb789288b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gagisejokunego.rf.gd/44945113180.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b16ae63d-cb92-4835-9707-2db9a5ac55aa/wujifamibanajotolumojiz.pdfIn PDF document text
    • https://s3.amazonaws.com/jemisajoda/how_to_fix_bluetooth_issues_on_windows_10.pdfIn PDF document text
    • https://s3.amazonaws.com/wurivuve/fetawinoxuwapiri.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5fc66f85-5691-4a49-ac53-bc9ef5fa9134/65591290289.pdfIn PDF document text
    • http://mepitar.atwebpages.com/20986296258.pdfIn PDF document text
    • https://s3.amazonaws.com/muxegeza/award_show_music_free.pdfIn PDF document text
    • http://radoletoma.epizy.com/dirudazaxaxa.pdfIn PDF document text
    • https://s3.amazonaws.com/timeziso/26199948960.pdfIn PDF document text
    • https://s3.amazonaws.com/rurovikejigibu/reflective_practice_template_rcpsych.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_off0000c865.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC865 5620 bytes
SHA-256: 5ed2276b0c1ef3d8a2cb5346191718a40e667f4dd8e08cbafecb8e7efe46da73
font_01_sfnt_off0000db5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB5F 11000 bytes
SHA-256: 46c5a9726cc84672751af861c70b4267478a1d7922c55f8e257edea6afb41a83

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