Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ad7deb168c1ab0c…

MALICIOUS

PDF

82.0 KB Created: 2021-09-22 12:47:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: d4863c71eb0cf8e456e7ba8783d9bba8 SHA-1: f356e68aa88436d90e74a6e0869154492d7b57cf SHA-256: 2ad7deb168c1ab0ceb0efcf6bc534fc1de25423d1542935fd9f64957a225fa17
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to various domains, many of which are identified as part of a link farm. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests a malicious intent to direct users to potentially harmful content. While no scripts were explicitly extracted, the nature of the embedded URLs and the ML classifier's high confidence indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 http://rollfactorytogo.com/uploads/files/bidabosejaled.pdf In PDF document text
    • http://afinamebel.ukrkarta.ua/fckeditor/userfiles/file/jabuvefadiwepifidenutoz.pdfIn PDF document text
    • http://wooshin.kr/uploaded/file/1839884041614899ad73bb1.pdfIn PDF document text
    • http://www.gonouvellezelande.com/files/divenebatumama.pdfIn PDF document text
    • http://ecole-belair.com/ecole/file/zugiluwomosapobun.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/lutujowoboraro.pdfIn PDF document text
    • https://pasarantogel.com/contents/files/batefemanovasimod.pdfIn PDF document text
    • http://changwontour.kr/FileData/ckfinder/files/20210914_B2D170C3CEC5EF31.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/o7c9t947q4snqc5tuo9lm7qtm2/xoredupeg.pdfIn PDF document text
    • https://securitydm.net/slicice/file/63075477852.pdfIn PDF document text
    • http://fabiocaronearchitetto.com/userfiles/files/bedimodezarozo.pdfIn PDF document text
    • https://netcsemege.hu/ckfinder/userfiles/files/39175738990.pdfIn PDF document text
    • http://hoteldanang.vn/uploads/images/files/56008416646.pdfIn PDF document text
    • http://sutinlawkrabi.com/ckfinder/userfiles/files/sawozakesidekikokiratapi.pdfIn PDF document text
    • http://lamay.de/userfiles/file/kerakowixuzot.pdfIn PDF document text
    • http://avatars.ru/userfiles/file/kofobemerakenumozobifa.pdfIn PDF document text
    • http://ulrike-mayer.de/userfiles/files/wisutolabofuzajom.pdfIn PDF document text
    • http://thechitay.com/uploads/userfiles/file/wutevedetagurapit.pdfIn PDF document text
    • http://lavalnerina.com/userfiles/file/20704353626.pdfIn PDF document text
    • http://rosabaum.de/web/editor/files/81317837545.pdfIn PDF document text
    • http://aibasylhet.edu.bd/app/webroot/ckfinder/userfiles/files/gosunarogixatinaguzegovo.pdfIn PDF document text
    • http://sanfrancescovet.com/userfiles/files/nemifodif.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16149ebacb21dd---86664127255.pdfIn PDF document text
    • http://odessawa.com/userfiles/file/poderoxarav.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=how+to+see+recently+deleted+apps+on+androidPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dacd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDACD 18084 bytes
SHA-256: d72e0183bc55cd2140b44f8613e587572f2bf9a83be7addf259999ac7f1f5c5e
font_01_sfnt_off0001099e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1099E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000121b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121B5 10696 bytes
SHA-256: 61437b1316ec8871e1bc40b265aa1935cfbf5800739f74caf4fbdc318eebf303

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