Malicious PDF — malware analysis report

Static analysis result for SHA-256 aed71a9989356185…

MALICIOUS

PDF

70.1 KB Created: 2021-04-19 09:15:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 34740aaa185287c7b7dbbdf169ee9490 SHA-1: ba023b7b13fbdc4e6de82c2ec45e8f1b8d95c373 SHA-256: aed71a998935618532fb606c0d16f7d58f96beca968bdf39035ac62b69ec8daf
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that appears to be a lure, disguised as a search result for a technical document. This URL likely leads to the download of a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://midufefew.ru/strik?utm_term=how+to+use+digital+multimeter+in+tamil+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4494433/normal_6029b32fb879c.pdfIn PDF document text
    • https://cdn.sqhk.co/govazilose/RMqjhDl/todo_list_printable.pdfIn PDF document text
    • https://cdn.sqhk.co/dezorevukor/DMZ5Xji/jatikoxapugizinalar.pdfIn PDF document text
    • https://cdn.sqhk.co/tajixixejafi/hfRjghj/free_gems_on_episode_without_human_verification.pdfIn PDF document text
    • https://cdn.sqhk.co/kojariwirip/idvjdhh/80307985190.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366665/normal_5ff9124a8e71b.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/pozokimepe/valesinubozetazob.pdfIn PDF document text
    • https://s3.amazonaws.com/wesezuzuvalirik/charlie_chaplin_the_kid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e39fab56-c4a4-46a5-8d7e-accb5ec0117e/62639953435.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8e71513-b7bb-4ca2-917d-9dc7eb3bc2d2/canadian_model_of_occupational_performance_and_engagement_example.pdfIn PDF document text
    • https://s3.amazonaws.com/lanaladu/dewexivamakuzatabiwizil.pdfIn PDF document text
    • https://s3.amazonaws.com/vipuxafol/sejipuwurosomafum.pdfIn PDF document text
    • https://s3.amazonaws.com/xixonu/sword_art_online_progressive_7.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86dc49fb-572a-4361-90d7-88fcb21ccae2/simuvafukubobexofawak.pdfIn PDF document text
    • https://s3.amazonaws.com/fofeguj/kezise.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb019952-9f90-46e5-8200-f1548a02fdc6/fawim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9c03a89-5398-4486-88ae-f1b48619a5a1/76781858605.pdfIn PDF document text
    • https://s3.amazonaws.com/rogugagatuf/31631211266.pdfIn PDF document text
    • https://s3.amazonaws.com/lusabifef/best_way_to_learn_trading_in_stock_market.pdfIn PDF document text
    • https://s3.amazonaws.com/xakajoziwibi/parrot_ck3100_manual_utilizare.pdfIn PDF document text
    • https://s3.amazonaws.com/nonipesikiri/wiromakafosuwur.pdfIn PDF document text
    • https://s3.amazonaws.com/dojonuta/holcim_philippines_annual_report_2017.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_off0000d259.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD259 5416 bytes
SHA-256: 44d58e1ee044a87d5bfa29dc53349f05b585ecf6dc27156dafaf03fa877bdf44
font_01_sfnt_off0000e4be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4BE 10660 bytes
SHA-256: 2293de22040fbbe369799ac4b3df9a459e85b1309f68bf41d84308fc4a67f29b

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