Malicious PDF — malware analysis report

Static analysis result for SHA-256 adb3bae69ef1b58d…

MALICIOUS

PDF

78.2 KB Created: 2021-03-19 19:21:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c5a7bdd0f28935442f950c11e7bb67bd SHA-1: bdf29e17ea972681ff4f524f2c704ec7b93e54a7 SHA-256: adb3bae69ef1b58db3199f8f864cedeac2502fff30f9f6a588a1acec507a01df
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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://jumiwimov.ru/aws?utm_term=what+do+the+lights+mean+on+xfinity+modem PDF link annotation
    • http://flowerport.store/wire_loss_calculator_dcromtx.pdfIn PDF document text
    • https://cdn.sqhk.co/bexoninodag/j5CTijB/88384450210.pdfIn PDF document text
    • http://madewithsunshine.com/ram_1500_diesel_problems1iiki.pdfIn PDF document text
    • https://cdn.sqhk.co/jojikoxazew/abgiaGi/jurassic_craft_mapa.pdfIn PDF document text
    • http://olivamebel.com/how_to_draw_anime_male_eyeskqr4m.pdfIn PDF document text
    • http://sobakin.space/amsterdam_centraal_platforms77icd.pdfIn PDF document text
    • http://pushbiz.fun/beats_studio_3_owners_manualkx2dy.pdfIn PDF document text
    • https://cdn.sqhk.co/givesaxi/jiZiiia/reckless_traffic_racer_game_2019_download.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
    • https://85ed388a-52e0-4e79-9737-9d4b769dda71.filesusr.com/ugd/bb10c5_fbefae110b3040d8b2600016ec99809d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/jetewal.pdfIn PDF document text
    • https://43cb2d18-1589-43a7-b1c5-fe1278e1c76d.filesusr.com/ugd/370b54_9ede625a39b94e289af47c3691d14ece.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mujevubutukoxu/dowonoxebok.pdfIn PDF document text
    • https://3c4962d9-41f7-4f14-8396-dad57cc8de20.filesusr.com/ugd/a2de88_95ede496420e4d44b62b62d0a5af0203.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tumuzu/21399309492.pdfIn PDF document text
    • https://s3.amazonaws.com/ponivotigegepub/anti_slip_sheets_for_pallets.pdfIn PDF document text
    • https://s3.amazonaws.com/wemupajese/26263189927.pdfIn PDF document text
    • https://2ffa788b-df2f-461f-b9c5-573bec542745.filesusr.com/ugd/374ce0_281314babee44d94b74fc6a9938fd677.pdf?index=trueIn 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_off0000e53f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE53F 5196 bytes
SHA-256: a14b8b5ac6206475e3467f613aae34bd83bbf39e725732465433027781e9b637
font_01_sfnt_off0000f6e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6E4 11180 bytes
SHA-256: 9f11ffa810510222fd84e523eb0587aa27ff2beb4c98532b7618375f5708f5ab
font_02_sfnt_off00011d25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D25 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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