Malicious PDF — malware analysis report

Static analysis result for SHA-256 cef29b093dd49a87…

MALICIOUS

PDF

75.2 KB Created: 2021-02-25 21:52:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: e799e150d0c59d0a4d94d9c98be8a696 SHA-1: 106fc96b933c3a1f7ba018aff7eadf6a1622759f SHA-256: cef29b093dd49a879cacdd4a2fe4a2bcbbebc0eb378987548cb7a4ed763a90e6
254 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous links, many pointing to redirectors and SEO link farms, indicating a phishing or malware distribution attempt. The primary lure appears to be a "Dragon ball xenoverse leveling guide" which redirects to malicious infrastructure. The ML classifier and ClamAV detection strongly support the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • 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://yafferge.ru/wix?keyword=dragon+ball+xenoverse+leveling+guide In PDF document text
    • https://cdn.sqhk.co/movozuba/ihkhggc/world_boxing_championship_2019_medal_table.pdfIn PDF document text
    • https://guxojifupu.weebly.com/uploads/1/3/1/4/131438233/lexujigeligukiwoja.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375352/normal_5ff3f4a8633e0.pdfIn PDF document text
    • https://cdn.sqhk.co/verexumifo/jctjhga/american_dad_apocalypse_soon_mod_apk_revdl.pdfIn PDF document text
    • http://legko.travel/wexirodasemexenusilqgn9.pdfIn PDF document text
    • https://delazodudiz.weebly.com/uploads/1/3/4/5/134591817/bituwonef.pdfIn PDF document text
    • https://cdn.sqhk.co/kawinojos/bhhhdia/play_age_of_empires_2_steam_mac.pdfIn PDF document text
    • http://characduwe.space/89984525888pd99f.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/kovibu/what_is_management_information_systems_jobs.pdfIn PDF document text
    • https://s3.amazonaws.com/jajoxulabojaso/craft_cms_404_template.pdfIn PDF document text
    • https://s3.amazonaws.com/bisute/26288018406.pdfIn PDF document text
    • https://s3.amazonaws.com/kisimujuk/70745099858.pdfIn PDF document text
    • https://s3.amazonaws.com/figugipopar/gruffalo_characters_colouring_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/donake/ragnarok_mobile_dagger_rogue_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/jalasilunaz/kogekujomivede.pdfIn PDF document text
    • https://s3.amazonaws.com/wuxupewu/ecology_review_worksheet_1_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/rujimidujek/simon_and_garfunkel_sound_of_silence.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_off0000e967.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE967 5260 bytes
SHA-256: e729cf0fb010597e58426d78b130c0694b1847868858142f775deec880ac3223
font_01_sfnt_off0000fb60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB60 10536 bytes
SHA-256: 13473f53a643e8036c525c08a744091422b30829aec43e9f04e2a6f8da59fdc0

Open this report in the interactive analyzer, or submit your own file for analysis.