Malicious PDF — malware analysis report

Static analysis result for SHA-256 f06d30f07a3aa5ef…

MALICIOUS

PDF

83.2 KB Created: 2021-05-25 15:27:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: d09c55f4f01ea4d244bf611b8844d841 SHA-1: 729b154fc562001f26f4c321cd2aaa981a823084 SHA-256: f06d30f07a3aa5ef090904028244b06b054186d34595171495b50177a76585d2
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains an embedded URL that redirects to a phishing site, as indicated by the 'PDF_SEO_UTM_REDIRECTOR_LINK' heuristic. The ML classifier and ClamAV also flagged this file as malicious, suggesting a phishing or trojan payload. The document body appears to be obfuscated or corrupted, preventing a deeper analysis of its specific content, but the presence of a redirector URL is a strong indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://lozipotod.ru/strik?utm_term=unit+chemical+names+and+formulas+worksheet+3+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4382781/normal_5fe7afa634e82.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366642/normal_606a200c802c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460477/normal_603e649991189.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410727/normal_6001aa9ed1b69.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460461/normal_604754d2782e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413578/normal_6058bd8335fa9.pdfIn PDF document text
    • https://dosijusesuxola.weebly.com/uploads/1/3/4/3/134305349/a6e851016c.pdfIn PDF document text
    • https://menekagamop.weebly.com/uploads/1/3/4/0/134097565/3018330.pdfIn PDF document text
    • https://kuwoloxafi.weebly.com/uploads/1/3/0/8/130873903/dinalomovajo-fawamaxuguru.pdfIn PDF document text
    • https://nefabilaj.weebly.com/uploads/1/3/1/4/131438225/3767111.pdfIn PDF document text
    • https://volifaredibeg.weebly.com/uploads/1/3/1/4/131437601/81b40225aa764.pdfIn PDF document text
    • https://relitaju.weebly.com/uploads/1/3/4/8/134888942/c240d1c52d4e.pdfIn PDF document text
    • https://lifexusubanipi.weebly.com/uploads/1/3/4/3/134377686/1837030.pdfIn PDF document text
    • https://sifovepemu.weebly.com/uploads/1/3/4/3/134373157/gosofumububevitano.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/teximikamukubo/9098708440.pdfIn PDF document text
    • https://s3.amazonaws.com/risalenefazozo/37992018528.pdfIn PDF document text
    • https://s3.amazonaws.com/fotojipifuzitul/us_history_timeline_1800s_to_1900s.pdfIn PDF document text
    • https://s3.amazonaws.com/devuxuzejozam/53544041722.pdfIn PDF document text
    • https://s3.amazonaws.com/mamukawaxatali/95138066209.pdfIn PDF document text
    • https://s3.amazonaws.com/bivanud/before_the_flood_movie_in_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/sisaxu/94591622550.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_off0001071d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1071D 5572 bytes
SHA-256: 3457c8ce584fd9aa71a16608844445f72c6db8fd56bf744a0f793f4e9e68c867
font_01_sfnt_off000119fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119FE 10812 bytes
SHA-256: 5baa373349d7fad56bca2c9457bb245527191775713ad6dae08c186bb45d24bc

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