Malicious PDF — malware analysis report

Static analysis result for SHA-256 c98b2472fe776b0c…

MALICIOUS

PDF

216.4 KB Created: 2021-06-10 09:54:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 88768590d28038befeccb097ffafa3d6 SHA-1: 123acdfbfcf705d3f406638fd36d4a9c0c48448b SHA-256: c98b2472fe776b0c33fb0b5510e88ddb393ff936f2feb4d408edadb8e0e41b6b
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, with high-severity heuristics indicating an image lure linking to an SEO redirector. The document body, though heavily obfuscated, contains text related to 'Luca full movie with english subtitles', suggesting a lure to entice users to click the embedded malicious URL. The primary IOC is the redirector URL which is likely used to host phishing content or distribute further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9720

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://pistant.ru/pbw?utm_term=luca+full+movie+with+english+subtitles PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4500199/normal_604ccebdd0675.pdfIn PDF document text
    • https://panonalosisewe.weebly.com/uploads/1/3/5/3/135316392/bixutibafaselib.pdfIn PDF document text
    • https://mevajivikupewog.weebly.com/uploads/1/3/0/7/130775189/lijarimegeneb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412592/normal_60bec58f91686.pdfIn PDF document text
    • https://deluneruniji.weebly.com/uploads/1/3/4/0/134012649/060fbde23.pdfIn PDF document text
    • https://rukusipaxup.weebly.com/uploads/1/3/2/6/132683367/suxepizipotopasitox.pdfIn PDF document text
    • https://wajirabipuxu.weebly.com/uploads/1/3/0/8/130874591/busibe.pdfIn PDF document text
    • https://bozuwosumexoxal.weebly.com/uploads/1/3/2/6/132682772/76ee0.pdfIn PDF document text
    • https://gedaxafi.weebly.com/uploads/1/3/4/3/134340736/5749522.pdfIn PDF document text
    • https://kogimejazasopuj.weebly.com/uploads/1/3/4/7/134713999/bexumivo-muxofalabetip-xatefebevusano-gewituzakunaz.pdfIn PDF document text
    • https://lumikefobebodas.weebly.com/uploads/1/3/4/3/134324067/da01145808001f4.pdfIn PDF document text
    • https://volufijipezuji.weebly.com/uploads/1/3/4/7/134703795/63eb22d5b27af57.pdfIn PDF document text
    • https://nimapefakapag.weebly.com/uploads/1/3/5/3/135324130/265e092ac.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vifogajo.pbworks.com/f/stress_portrait_of_a_killer_transcript.pdfIn PDF document text
    • http://nelivameg.pbworks.com/f/46740638398.pdfIn PDF document text
    • http://kakewizajupe.pbworks.com/f/what_the_12_steps_of_aa_mean.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68a44ecd-934f-4e98-88db-8600982d6a31/30589051849.pdfIn PDF document text
    • http://sisagexal.pbworks.com/w/file/fetch/144505131/94609385688.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfe82578-c858-49bc-b3fe-0abcb78b8949/emerald_tablets_of_thoth_full_text.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d67ebb3f-f41c-4322-b501-47bac8937794/venn_diagram_math_equations.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d71a0719-1e6d-464a-beaf-a25d1863ece3/22404338247.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_off00031b8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31B8D 5432 bytes
SHA-256: 1f2a7ec0d799945a5a0c9ed5f4f570705c5de47cc6e45ce47e1ed48ddb487a54
font_01_sfnt_off00032e0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32E0B 10432 bytes
SHA-256: 3ad66ea227e91472ea9c2a8f759d384fb053e091be01fde5513933c9bc28dc95

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