Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1ca631dd8b91afd…

MALICIOUS

PDF

99.8 KB Created: 2021-05-24 00:54:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 11d80dbbe62c6e204c71b7e7aaaf64fd SHA-1: c934a964db88f52e1cec968466315a39cb87c4dc SHA-256: a1ca631dd8b91afd082ae9ff595f4f858fb973f35bc92f643947f96edbea339a
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 0.9949

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://golowaki.ru/strik?utm_term=certificacion+de+tenencias+estado+de+morelos PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4422147/normal_6045171403b16.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379602/normal_6038090d29238.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402533/normal_6038d0dde9ff7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501367/normal_6009ae3f222b2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378383/normal_5feba93221586.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387433/normal_6044ccbed35d0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487632/normal_6004723dda19a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481516/normal_5fe01bdcdf4c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478685/normal_5fdb02951dfaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471091/normal_604d1ae586955.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476941/normal_604d3e74c8555.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416929/normal_5ffc9bc937229.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422133/normal_600f7f0977811.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367937/normal_5fe894520fe23.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487663/normal_5ff3533e99d03.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451950/normal_6054f9e8df943.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373304/normal_5fd9fa6fd5728.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/kulinisokakewi/12702052291.pdfIn PDF document text
    • https://s3.amazonaws.com/bagisi/42216330813.pdfIn PDF document text
    • https://s3.amazonaws.com/retisovojor/engineering_drawing_instruments_and_their_uses.pdfIn PDF document text
    • https://s3.amazonaws.com/xidazeze/59893356163.pdfIn PDF document text
    • https://s3.amazonaws.com/jalasilunaz/5397021454.pdfIn PDF document text
    • https://s3.amazonaws.com/rexogeguxosix/toolbar_back_arrow_color_android.pdfIn PDF document text
    • https://s3.amazonaws.com/mesixadelomomo/94243786322.pdfIn PDF document text
    • https://s3.amazonaws.com/fixararololu/53190442874.pdfIn PDF document text
    • https://s3.amazonaws.com/levumoduf/bennie_and_the_jets_piano_sheets.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_off00013908.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13908 4980 bytes
SHA-256: a320a20b4ac79d52689f6f61dadc3907e586e74bf323ac508806754013d3dc5d
font_01_sfnt_off000149d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149D4 12164 bytes
SHA-256: d586def85c8b8cddec218648a861caa9b1842763b9cb4a2cdaadf921da1f8fb5
font_02_sfnt_off00017189.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17189 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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