Malicious PDF — malware analysis report

Static analysis result for SHA-256 39aa50aff4c0ce7a…

MALICIOUS

PDF

83.2 KB Created: 2021-03-08 11:00:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 7e08f9b9046fcf1a174e05c552628ef9 SHA-1: 22d30495402fa1df684a2b5627f8e70748834f88 SHA-256: 39aa50aff4c0ce7a838b953a400db30367484c19ff99010b17459ce5d4c03683
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains heuristics indicating it is a phishing lure, specifically using an SEO redirector to disguise a free download. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://nipisod.ru/123?utm_term=taux+d%2527+amortissement+degressif+formule PDF link annotation
    • https://cdn.sqhk.co/nafolekuge/sjigehd/last_island_survival_and_craft_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/rizanatu/jighUhe/general_motors_cars_2021.pdfIn PDF document text
    • https://cdn.sqhk.co/buvaboda/YuibGbS/daybetter_led_lights_remote_control_app.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500670/normal_601c61cdaa0d7.pdfIn PDF document text
    • https://cdn.sqhk.co/pegipoveridi/hdLhbii/mazawesaro.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476443/normal_601dca6c49adb.pdfIn PDF document text
    • https://cdn.sqhk.co/pamavunawi/uihjbha/zozalonesebabajonosisuzob.pdfIn PDF document text
    • https://cdn.sqhk.co/nojedevatas/TibUjbW/tamil_fm_radio_online_play.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366032/normal_6040125cc5cff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459060/normal_6015ad58a5e2b.pdfIn PDF document text
    • https://cdn.sqhk.co/zoxowowi/I8Pidid/10699202565.pdfIn PDF document text
    • https://cdn.sqhk.co/xoluxuroku/jjigjhv/fontspace_commercial_use_fonts.pdfIn PDF document text
    • https://cdn.sqhk.co/paxelababeg/dMiaii9/dosewowekeg.pdfIn PDF document text
    • https://cdn.sqhk.co/zegegajugot/cUjfvhe/zebetijoxuza.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://gapifemesi.rf.gd/xewodobexero.pdfIn PDF document text
    • http://bemawom.rf.gd/aocs_official_method_ca_5a-_40.pdfIn PDF document text
    • https://s3.amazonaws.com/xewamejixolefaj/dodge_durango_towing_a_camper.pdfIn PDF document text
    • https://s3.amazonaws.com/liwafo/recruitment_consultant_interview_questions_and_answers.pdfIn PDF document text
    • http://wawavubuwile.rf.gd/oriflame_catalog_march_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/pewibim/sepufuvogesim.pdfIn PDF document text
    • http://xigasew.epizy.com/daxofu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f352.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF352 5160 bytes
SHA-256: b215903d74b4973d9ff10a2c735ef2a427f0e3b2fdcfe5394998b8763f25c42b
font_01_sfnt_off000104d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104D7 14232 bytes
SHA-256: 333251e003c83ed93581afbe3346a951d0f03347061451aac83a70e08ae28ecd
font_02_sfnt_off00012f31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F31 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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