Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa70a6a38d46753d…

MALICIOUS

PDF

67.7 KB Created: 2021-03-17 21:28:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 2309daf92d1f54467e7bfd40f0dadcec SHA-1: 227a3541249db53d90f658239607f614f1ad30d8 SHA-256: fa70a6a38d46753dbbf4e6965dc01b1430944c13fb39fe6b9a2577c1dfc998bd
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a heuristic indicating it's a phishing lure, specifically using an SEO redirector with a deceptive link related to traffic reports. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded URL is the primary indicator of compromise, likely leading to a phishing page or malware download.

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://mezovuduw.ru/123?utm_term=10+freeway+traffic+report+beaumont PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4373240/normal_5ff116147ea91.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500677/normal_6048500a7dd7e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456369/normal_603bde8add219.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491936/normal_602c4c1d8d1b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380536/normal_5fdb905c66922.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/vabedafozo/facebook_lite_latest_version_apk_apkpure.pdfIn PDF document text
    • https://s3.amazonaws.com/lezopobigeza/cd_calypso_antigas.pdfIn PDF document text
    • https://s3.amazonaws.com/rogugagatuf/american_history_textbook_7th_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/julexekubaj/netgear_gs108_vlan_setup.pdfIn PDF document text
    • https://s3.amazonaws.com/makumapikeze/fc_barcelona_song.pdfIn PDF document text
    • https://s3.amazonaws.com/lanorolowu/easy_worship_moving_backgrounds_free.pdfIn PDF document text
    • https://s3.amazonaws.com/dalava/chrome_web_browser_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b2c1193-aa6c-4bf2-902c-ade93bf89caf/darokapibo.pdfIn PDF document text
    • https://s3.amazonaws.com/vebenok/background_remover_software_free.pdfIn PDF document text
    • https://s3.amazonaws.com/pogolo/best_home_dehumidifiers_consumer_reports.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/862c42de-32ec-4ac4-a1c0-1f529b3e61f2/build_jar_maven_intellij.pdfIn PDF document text
    • https://s3.amazonaws.com/degagaziv/bhavnagar_university_online_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54864193-fbdb-4440-b9c7-467e57fd0cc9/xogirodelumeg.pdfIn PDF document text
    • https://s3.amazonaws.com/tafogusegabomu/posafominepipiju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8956888c-5f20-4bb3-9057-b8165527b1c8/pobaxolawa.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_off0000ca35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA35 5384 bytes
SHA-256: 28f24876150c86c67e44f180eb8f92e70c77b08b9e366aaf75a2dc61e4a909ae
font_01_sfnt_off0000dc8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC8E 10336 bytes
SHA-256: da0cb51a86368ef01a53cb605f8c450301888c17676e92ba7f041bafc7e08a53

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