Malicious PDF — malware analysis report

Static analysis result for SHA-256 78463addb8d6dfc0…

MALICIOUS

PDF

80.9 KB Created: 2021-04-13 22:21:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: d246636732a440b933c4159d8f877303 SHA-1: c8d26350c6dc63bbb54a87462451eef244271e02 SHA-256: 78463addb8d6dfc0ae791528056ac88b396a0af258693c21319392b28d456fc5
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 flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The presence of an external URI and an SEO redirector link, disguised as a download for 'Bram Stoker Dracula's Guest PDF', strongly suggests a phishing or malware distribution attempt. No scripts were extracted, but the overall structure and heuristics point to a malicious document designed to lure users to a compromised URL.

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://soxebez.ru/strik?utm_term=bram+stoker+dracula%2527s+guest+pdf PDF link annotation
    • https://cdn.sqhk.co/xevowuto/ijekmgd/lightroom_presets_app_store.pdfIn PDF document text
    • http://epipog.com/how_to_dry_boletesqzr7l.pdfIn PDF document text
    • https://cdn.sqhk.co/gaduwifawide/uLqjdig/mckinsey_automation_report_2017.pdfIn PDF document text
    • http://znasila.ru/c_template_functora8z8y.pdfIn PDF document text
    • https://cdn.sqhk.co/poxudanefisi/XMG5DH1/infinity_train_simon_wiki.pdfIn PDF document text
    • https://cdn.sqhk.co/pinofizulag/jjahf28/lotomo.pdfIn PDF document text
    • https://cdn.sqhk.co/vijukifezu/ZAZhjfs/takubemavatevivipegujolu.pdfIn PDF document text
    • https://cdn.sqhk.co/kibutonap/9gdihic/gagegosilapujezo.pdfIn PDF document text
    • https://cdn.sqhk.co/vefusujix/gvii8ia/17658707283.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465274/normal_606dd66d0001e.pdfIn PDF document text
    • https://cdn.sqhk.co/jurufovowufu/cugfihC/code_editor_online_js.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453550/normal_5fc604091b884.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416918/normal_60136de3921a8.pdfIn PDF document text
    • https://cdn.sqhk.co/migazajigum/Dhhhdie/18418118412.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407749/normal_605a9d9c156d6.pdfIn PDF document text
    • https://cdn.sqhk.co/tanusulirava/ap4AiiB/neketekiz.pdfIn PDF document text
    • https://cdn.sqhk.co/kawinojos/TEiEieP/62419355822.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489061/normal_600c5f6e22b0f.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

Related samples 5

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F0 5348 bytes
SHA-256: 1dde431384087de45a8025422d9da4ed935e9b5aba0aa4b2717be600f0210b54
font_01_sfnt_off00010332.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10332 10920 bytes
SHA-256: b05e41830f1aefd29c00bee859cf7fd38af4c0fa133c9f4ec2de9d7dccff7871
font_02_sfnt_off000128ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128AB 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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