Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b4611fd023baeca…

MALICIOUS

PDF

69.9 KB Created: 2021-01-31 13:51:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 0fea1271686656be8d0ec8630a4c23a2 SHA-1: b94ac2c5b40451eaaa89565bfc510b7ab87beddb SHA-256: 8b4611fd023baeca0d7c3e4d1247f6e8f182d7e7fa4a5995ca17987f697b1086
204 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://maypoin.ru/aws?utm_term=apostle+joshua+selman+messages+2017 PDF link annotation
    • https://mipabewezodif.weebly.com/uploads/1/3/5/3/135315693/ravuv_dexonusuvevej_konuguxuzuvoma_nawubaluzab.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486351/normal_5fc7099e1867a.pdfIn PDF document text
    • https://sevezumu.weebly.com/uploads/1/3/2/7/132710575/7721256.pdfIn PDF document text
    • https://fanakigefepawaf.weebly.com/uploads/1/3/0/8/130873796/f89a1c099d5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416490/normal_5fce6c44f0501.pdfIn PDF document text
    • https://cdn.sqhk.co/movijomo/iehhig2/slap_king_java_game_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374369/normal_5fd34dc02ed7a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466664/normal_5fcb43968f371.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413454/normal_60058bd83a0b0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459654/normal_5fca02625f2c8.pdfIn PDF document text
    • https://sowotelimavo.weebly.com/uploads/1/3/4/0/134000290/b3eb9cfddc.pdfIn PDF document text
    • https://cdn.sqhk.co/fedelubu/hgdnhds/food_lion_sunday_hours_adairsville_ga.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412761/normal_600e89922c4ad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369153/normal_5ffd1a78bd9e7.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/xijuxosisomuna/kia_cerato_2010_repair_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/zuses/50432034549.pdfIn PDF document text
    • https://s3.amazonaws.com/wotodedaruzuk/lipid_profile_report_analysis.pdfIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/indian_rupee_symbol_for_microsoft_word.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_off0000d533.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD533 5608 bytes
SHA-256: 9455174b0356f0ec87cdf341d3092dcb1ddda57cb0959091fe0e35e75d4aad29
font_01_sfnt_off0000e835.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE835 9944 bytes
SHA-256: c13e5b9160ffaef5f7dde16087ac012d45db4404bc362733d7ddd7a6b24f6d1f