Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a4d70bb43a59dbc…

MALICIOUS

PDF

87.0 KB Created: 2021-01-05 01:58:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: cae98c4c05cc3ea24798235f7561bfac SHA-1: 8468f835de0b9b1db0f104daa67af323c14cd69f SHA-256: 0a4d70bb43a59dbca3ec4c0b7879a59ae8264183d38a37be5c97f7ab6669ac28
154 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 routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://traffmen.ru/aws?utm_term=hahu+amharic+keyboard+apk In PDF document text
    • https://bopugokux.weebly.com/uploads/1/3/4/9/134901566/finijupof_bawiguvu_jomugutob_povigutefokijuf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496402/normal_5fd1c61b52831.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379374/normal_5f8dca9912cd4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380219/normal_5fa1bcc45e89a.pdfIn PDF document text
    • https://bulireta.weebly.com/uploads/1/3/4/7/134727307/854ba185c57.pdfIn PDF document text
    • https://zuzekogidu.weebly.com/uploads/1/3/4/6/134699906/gofajobajatavonon.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://uploads.strikinglycdn.com/files/88e7f5d6-f1a2-45cf-adbb-7b4301669bf6/noruzenigek.pdfIn PDF document text
    • https://s3.amazonaws.com/mokamoba/deropezurexovavona.pdfIn PDF document text
    • https://s3.amazonaws.com/jadudusujuje/mtk6582_cwm_recovery_img.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9eff6655-3596-43a4-8fe5-66add5fedeb2/yellow_submarine_piano_sheet_music_musescore.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 7

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dadd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDADD 17488 bytes
SHA-256: 8bf523303939b34c96369677165b6af9cba1b852d70edcb7796a5d42f9bc18ac
font_01_sfnt_off000109d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109D0 5064 bytes
SHA-256: 716b242788188609d96fcc2b75e27845d630c1a89b86e95dfba8dcc5a30808d5
font_02_sfnt_off00011af4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AF4 10756 bytes
SHA-256: ca26f68d6d8129f045a5409068656f263d1c112174d5d64c694e926d3017679e
font_03_sfnt_off00013f8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F8E 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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