Malicious PDF — malware analysis report

Static analysis result for SHA-256 47bbcf55f7210a94…

MALICIOUS

PDF

76.3 KB Created: 2021-02-20 22:23:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: f3605075b299bc58315eee3923e19b9c SHA-1: a8702155bb25709f0ba48fc449b5bf38250bd0ea SHA-256: 47bbcf55f7210a94fe196147e78456c205aae96ae40d48aa1868351f5cd8b6ed
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a large number of external links, identified as a link farm, directing users to various websites. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically a phishing or malware distribution campaign. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest an attempt to redirect users to malicious content, potentially leveraging embedded JavaScript for obfuscation or further redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://baarspo.ru/123?utm_term=francis+schaeffer+libros+en+espa%25C3%25B1ol+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4382948/normal_5fdfb73b36359.pdfIn PDF document text
    • https://gamevuwi.weebly.com/uploads/1/3/4/5/134525912/ef54ae724c1bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478950/normal_5fd85702824ad.pdfIn PDF document text
    • https://novomuzedideb.weebly.com/uploads/1/3/1/4/131406537/de2700.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405687/normal_6007e5d825983.pdfIn PDF document text
    • https://xapenivivafozeb.weebly.com/uploads/1/3/1/3/131379266/d5c38.pdfIn PDF document text
    • https://wolunogejafijut.weebly.com/uploads/1/3/4/6/134649672/4287931.pdfIn PDF document text
    • https://dibigisilob.weebly.com/uploads/1/3/1/6/131607467/rexuwuxu_rofovoredubin_pavabaxaf_bibogawunuvim.pdfIn PDF document text
    • http://raisinshq.pro/blues_songs_chords4gk0r.pdfIn PDF document text
    • https://pelefazefipaguj.weebly.com/uploads/1/3/4/8/134892892/fimeridugad.pdfIn PDF document text
    • https://latopekezap.weebly.com/uploads/1/3/1/4/131437375/295757.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369504/normal_5fedfdcf1e812.pdfIn PDF document text
    • https://menafemudiwifog.weebly.com/uploads/1/3/0/8/130813668/4363995.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405660/normal_600365a84fda5.pdfIn PDF document text
    • https://vuguzakinizole.weebly.com/uploads/1/3/4/4/134493236/093bd750054d.pdfIn PDF document text
    • https://pifavakibapel.weebly.com/uploads/1/3/0/8/130814246/napuxod-fotixomadurem-najezezeripovil-nozunufefajek.pdfIn PDF document text
    • https://boxotegiperofog.weebly.com/uploads/1/3/1/3/131398000/tajukizegu-bakamozig-bajow-sudajaf.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
    • 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_off0000dca7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCA7 5260 bytes
SHA-256: 89ab2da584f362b3c27b3c99e21e5e502f413f92d6de426338f8c2f199994ae0
font_01_sfnt_off0000ee1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE1B 11616 bytes
SHA-256: 5fa3f132a40c976d5dcf53ad7617adc10733ea2168de7d1a444430d047d03ca9
font_02_sfnt_off000113d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113D2 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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