Malicious PDF — malware analysis report

Static analysis result for SHA-256 15b6c5df8768e5f1…

MALICIOUS

PDF

77.0 KB Created: 2021-03-10 21:30:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: bea591d27a1d68e81aeca7cf902e68d8 SHA-1: dd8cb2073fc316a1b6f3a13e03d7bdfa741cf160 SHA-256: 15b6c5df8768e5f11a1fa6190726ffe4111cd13503bc53cb0c67d30ef0048b8a
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 high-severity heuristic firing for a redirector link, identified as an image lure for free-download phishing. The ML classifier and ClamAV also flagged the file as malicious. The embedded URL points to a redirector that likely leads to a phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://botokaw.ru/wix?keyword=whitman+and+dickinson+comparison PDF link annotation
    • https://cdn.sqhk.co/kopozufu/gjnuxid/fox_deportes_channel_on_spectrum.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484383/normal_5ffc3920cc0a1.pdfIn PDF document text
    • http://kekebum.22web.org/ravij.pdfIn PDF document text
    • https://cdn.sqhk.co/mivufarowiwi/gcjjojd/chutti_tv_heidi_in_tamil_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446036/normal_5ff13b923dcb1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428045/normal_6011a844b8ee0.pdfIn PDF document text
    • https://cdn.sqhk.co/miburixegapu/bvgdAgG/paxivolukujevefum.pdfIn PDF document text
    • https://cdn.sqhk.co/kajipazuto/hjNMigH/1583966046.pdfIn PDF document text
    • http://damodudajipofem.22web.org/walmart_black_friday_deals_2020_hours.pdfIn PDF document text
    • https://cdn.sqhk.co/bipozipo/egiZjh8/traffic_racer_police_mod_apk.pdfIn PDF document text
    • http://gosologesegob.iblogger.org/patanjali_ayurved_book_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416495/normal_601d946e48d87.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lamuvija.epizy.com/fractured_fairy_tale_stories_examples.pdfIn PDF document text
    • https://s3.amazonaws.com/gewisetug/27438197158.pdfIn PDF document text
    • https://s3.amazonaws.com/tenunud/66711939599.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6cd131ca-ff20-42aa-91bf-149e6f40195d/3877996729.pdfIn PDF document text
    • https://s3.amazonaws.com/buganabowumujef/amazon_prime_music_apkmirror.pdfIn PDF document text
    • https://s3.amazonaws.com/tixedujegibex/femalaxobuvotulosurawudos.pdfIn PDF document text
    • https://s3.amazonaws.com/banula/pukejejewitid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22c2b92f-4f06-4e70-97bc-5fdf3c4f56f5/51419418897.pdfIn PDF document text
    • https://s3.amazonaws.com/bejokazemur/oblivion_error_code_8014.pdfIn PDF document text
    • https://s3.amazonaws.com/dozuga/nintendo_gamecube_emulator_ios.pdfIn PDF document text
    • https://s3.amazonaws.com/sevoga/winkqcl_user_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/gozifep/91143998361.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8389eea0-3288-4eb5-82c3-08be4be61702/situmudujadijubuweredulo.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_off0000edc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC9 5356 bytes
SHA-256: 7a49aeb1ac3914986b81aa4e5291fd1975031344cceb3d86105dc589c053ebbc
font_01_sfnt_off0000ffde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFDE 10812 bytes
SHA-256: eb8bf00aee2e3bf491f6719f1458c2a1a1fa4a39c4494ee30c7105ff8c9e51d6

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