Malicious PDF — malware analysis report

Static analysis result for SHA-256 815918c4b09cd698…

MALICIOUS

PDF

71.4 KB Created: 2021-03-17 03:43:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 5c90143a42c37f4a58b8759f72813ded SHA-1: 5074abe1aa737c2d93112b8b874ded15d8ec9d1f SHA-256: 815918c4b09cd698c7983f1b4a7b86dd44f7b12af7648aed3c67f90d11f92fca
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains heuristics indicating it is a phishing lure, specifically using an image to redirect users to a malicious URL. The ML classifier and ClamAV detection strongly support its malicious nature. The embedded URL, https://soxebez.ru/wix?keyword=6th+element+sushi, is the primary indicator of compromise, likely leading to a phishing or malware download page.

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/wix?keyword=6th+element+sushi PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4475571/normal_602317897c257.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418391/normal_6047c9c0e8ebe.pdfIn PDF document text
    • http://lexanizisujufum.66ghz.com/52088704528.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccbe207d-def3-462d-94ab-5a4a5685b3c2/lativubolaberunele.pdfIn PDF document text
    • https://s3.amazonaws.com/vovuzize/dorazatosanorodu.pdfIn PDF document text
    • https://s3.amazonaws.com/kozewuposoridil/nukasesiwis.pdfIn PDF document text
    • http://nerigob.epizy.com/67666852889.pdfIn PDF document text
    • https://s3.amazonaws.com/godoremitiwuja/79704804570.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f301698-49d7-41cd-94df-b3d6a5d61073/91945320563.pdfIn PDF document text
    • http://junulanomelab.rf.gd/define_incentives.pdfIn PDF document text
    • http://xaxefoz.epizy.com/accelerator_theory_of_investment.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5efe2737-faf1-41ad-921c-754954f926a2/how_to_use_hvlp_gravity_feed_spray_gun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad9c5c54-9fb9-471f-8d40-6a86796e475c/33398292631.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dafe91ab-eb3d-46d2-adf4-85b3d48b11bc/voicelive_play_user_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/zafaronivaj/properties_of_carboxylic_acid.pdfIn PDF document text
    • https://s3.amazonaws.com/fofeguj/does_maschine_work_with_logic.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de1e3e99-fef0-4b38-b994-ee9ac90c13de/stack_on_gun_cabinet_lock_replacement.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06ed8fd6-8fe1-4c20-bcbe-12b45f029885/2007_toyota_yaris_sedan_yrs_for_sale_california.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d446117-3b73-4410-8c17-9ddc3284f0e5/66534602432.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwimadaneb/denutaxujorupesi.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_off0000dc94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC94 4680 bytes
SHA-256: f5a8cc91ada4f10dfd3edb957d804ca6b5eeab60d148ae1c3ab61d3695751bf7
font_01_sfnt_off0000ec58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC58 10704 bytes
SHA-256: 1e6b6c639d67101d638ca0d133610705a0371f757c97832f7c66168ab71f4272

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