Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea9b8ed11ce75722…

MALICIOUS

PDF

74.5 KB Created: 2021-03-31 15:20:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 372bfc51822b1a774a4102fb8bec56ac SHA-1: b13e53fe0d6b472a6d8c8845b9e3a08f1398b201 SHA-256: ea9b8ed11ce75722a015d0a3a9f176f6901a7864f8a91f48db2257cb22c45925
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 0.9997

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
  • 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://resalured.ru/wix?keyword=everquest+titanium+edition+iso PDF link annotation
    • https://cdn.sqhk.co/fusajovogi/k6RGSjh/jex_ads_old_version.pdfIn PDF document text
    • https://cdn.sqhk.co/wojusipi/hcjghdD/87727441230.pdfIn PDF document text
    • https://guvatezip.weebly.com/uploads/1/3/0/7/130776756/xefisafake.pdfIn PDF document text
    • http://powerhdniy.space/29783499110wdipy.pdfIn PDF document text
    • https://dawukobisoxewi.weebly.com/uploads/1/3/4/0/134040495/xosix_gulejamepix_rubeminozodu_joxiji.pdfIn PDF document text
    • http://tameenegypt.com/plague_inc_apk_mod_dna_infinito_201996ucw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406456/normal_6000ecaadb34d.pdfIn PDF document text
    • http://shopwithsale.website/the_professor_and_the_madman_movie_201901p9p.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413117/normal_60177eb62c07d.pdfIn PDF document text
    • https://gidiwukos.weebly.com/uploads/1/3/1/3/131381706/deselodesuxe-ratisugew-kamuwuse.pdfIn PDF document text
    • https://cdn.sqhk.co/titabofasika/qRtidhe/jepepezomasise.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450721/normal_60300c9f1eb16.pdfIn PDF document text
    • https://bosaralox.weebly.com/uploads/1/3/4/6/134608385/a2c2a248b2fc3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385863/normal_5fceea34879c7.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/muxegeza/steven_pinker_enlightenment_now_chapter_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/jamuluvuvava/33187997817.pdfIn PDF document text
    • https://s3.amazonaws.com/xufujofaleki/aplikasi_burma_tv_9._06.pdfIn PDF document text
    • https://s3.amazonaws.com/baxegezivumi/89855592151.pdfIn PDF document text
    • https://s3.amazonaws.com/gelawiweza/how_to_see_page_breaks_in_word_mac.pdfIn PDF document text
    • https://s3.amazonaws.com/dobikasukavu/hiper_scientific_calculator_apkpure.pdfIn PDF document text
    • https://s3.amazonaws.com/wetevali/15377995608.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_off0000e648.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE648 5080 bytes
SHA-256: c9d35fcd8a6262e46bf13f3f973f75a0a7f71d567cb45d9ff7fdcb1e0b244bf0
font_01_sfnt_off0000f77b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF77B 11016 bytes
SHA-256: c7d898eec80388ffc9311543d66e968c5592719ff7c742c999208b3b763e3c7e

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