Malicious PDF — malware analysis report

Static analysis result for SHA-256 557b29ae01f82810…

MALICIOUS

PDF

78.7 KB Created: 2021-02-21 00:19:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d5e82df3fb013475e409eecb3f1c2b00 SHA-1: a3775f8278daf6d607e00248f62b21c981f13612 SHA-256: 557b29ae01f82810180383cb83789e417019db490412558e7a5b3137c6259ce8
156 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 a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://bologen.ru/strik?utm_term=the+reluctant+fundamentalist+novel+review PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4484818/normal_5ff54f2e3a717.pdfIn PDF document text
    • https://duzareledibasa.weebly.com/uploads/1/3/4/8/134890493/f98a314bd9391c.pdfIn PDF document text
    • https://kowezuvive.weebly.com/uploads/1/3/4/6/134603832/vezaxavopowipe_musavuralolak_lujareketut.pdfIn PDF document text
    • https://rolorizumi.weebly.com/uploads/1/3/4/3/134316308/mawagef.pdfIn PDF document text
    • http://bettermoneytips.com/nezibibevurimagobojesator8oeo7.pdfIn PDF document text
    • http://lovelyhouse.online/house_rental_agreement_format_hyderabadmxol6.pdfIn PDF document text
    • http://itdiscounts.info/fozosiwiragonq9v79.pdfIn PDF document text
    • https://mazegiwekode.weebly.com/uploads/1/3/4/5/134529082/c881d06f.pdfIn PDF document text
    • http://copyrightram.net/best_psychology_books_on_human_behavior_freeurvtf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394061/normal_5fd2028324a8d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379603/normal_5fcea2f56d897.pdfIn PDF document text
    • http://vpntop.info/albion_online_android_won_t_installarr3x.pdfIn PDF document text
    • http://hq-cleartv.info/indirect_object_pronouns_spanish_answersqnsk7.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/gogunabones/google_chrome_extension_video_stream.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwotarotavuz/aesthetic_cursive_font.pdfIn PDF document text
    • https://s3.amazonaws.com/falevi/crystal_palace_vs_everton_match_report.pdfIn PDF document text
    • https://s3.amazonaws.com/zategafozasiru/nesuguvuk.pdfIn PDF document text
    • https://s3.amazonaws.com/wupagivoz/kirazupobopolimuzikak.pdfIn PDF document text
    • https://s3.amazonaws.com/tubupejevomo/lerisulixedoxajoradozot.pdfIn PDF document text
    • https://s3.amazonaws.com/nitizobuv/36316649498.pdfIn PDF document text
    • https://s3.amazonaws.com/ninazarila/adobe_reader_dc_standalone_installer.pdfIn PDF document text
    • https://s3.amazonaws.com/zagubip/nojez.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f459.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF459 5360 bytes
SHA-256: b7e12962c60b02d981428bd0c1b9d2683a4a37028e3de0690fc34463f10f6f52
font_01_sfnt_off0001067d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1067D 11248 bytes
SHA-256: 9ec8a42d0219c59369be026807b30eb373c4577630c0e2106566cbaec6db13e9

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