Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c310e9965438bdf…

MALICIOUS

PDF

66.2 KB Created: 2021-02-27 22:09:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 95f321bf6bb1f5535ce7edf36332b67f SHA-1: cb38c00d59aeea06211e236138b13eb482c6eee8 SHA-256: 8c310e9965438bdfbf22174615aa9c7a0de9169403733f77c21d2cc61a433af2
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing attempt. The document contains an embedded URI and a heuristic firing for an SEO redirector link, suggesting it lures users to a phishing site disguised as a free download. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://golowaki.ru/aws?utm_term=m-audio+keystation+pro+88+midi+controller PDF link annotation
    • http://rirenanevigi.22web.org/nike_child_shoe_size_guide.pdfIn PDF document text
    • http://jadogaxarabu.mygamesonline.org/mumakaxukatibawofow.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460680/normal_5fd104539df44.pdfIn PDF document text
    • http://universityru.fun/tosamoniijcth.pdfIn PDF document text
    • http://igme.site/kepuwemi9mwqf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455374/normal_600da33888cb2.pdfIn PDF document text
    • http://worldthailand.fun/300635822957z0jj.pdfIn PDF document text
    • http://eduha.online/android_version_list_latestdvlz2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4505699/normal_601af53b9e078.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485818/normal_5fcd0cd35f74c.pdfIn PDF document text
    • http://dvestideyli.xyz/78688092686uucfm.pdfIn PDF document text
    • http://umniashka.ru/john_nes_emulator_pro_apkbivq9.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/xarojapi/forasizapoduwuteta.pdfIn PDF document text
    • http://zaxatuparogojix.epizy.com/wawodofagoxovoje.pdfIn PDF document text
    • https://s3.amazonaws.com/kofabube/free_3d_scanner_app_android.pdfIn PDF document text
    • https://s3.amazonaws.com/purawuma/adele_one_and_only_piano_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/piradi/dfars_pgi_weighted_guidelines.pdfIn PDF document text
    • http://sutexuvidag.myartsonline.com/stihl_bg_56_best_price.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_off0000c669.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC669 5616 bytes
SHA-256: 9b9fb0db5e8b6d849002ca1d892757cd3a1de154f46094b92586237ac8166ca1
font_01_sfnt_off0000d98b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD98B 10012 bytes
SHA-256: 90ccc828d9336667f868f3c8b9d44fcc9498d342fdc364bf405940650d519d4a

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