Malicious PDF — malware analysis report

Static analysis result for SHA-256 517d1837e2ae1a6f…

MALICIOUS

PDF

85.7 KB Created: 2021-09-17 11:53:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 75c230bd94f79c2b7708da54d37d0207 SHA-1: 4ebd5e2d790f818d3ccd6d0061e526bc6404ad5f SHA-256: 517d1837e2ae1a6f8e0a7aee2d9a84830bc8babe60fbdd15aa356d30f3f3314c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links, many hosted on compromised websites, suggesting an attempt to redirect users to malicious content. The presence of a 'download euro truck evolution' UTM term in one URL, combined with the overall link farm structure, indicates a lure for software downloads. While no scripts were directly extracted, the PDF structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/233f7e31ef0c0cd49e8f3e2604d14405/21672746223.pdf In PDF document text
    • http://marketingnews.fr/images/file/pirezofubop.pdfIn PDF document text
    • https://www.rapn.ru/ckfinder/userfiles/files/xumaxodexubomonolebu.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134d939c5788---vuwelude.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/1795976ce805f5bb7b2259ec8368517d/vesaz.pdfIn PDF document text
    • http://cheniou.handysociality.com/upload/files/gosewokam.pdfIn PDF document text
    • https://grupahatak.pl/admin/_fck_files/file/30677771471.pdfIn PDF document text
    • http://yidaig.com/uploadfile/file/20210907051121.pdfIn PDF document text
    • http://e-instar.com/userfiles/file/53844794578.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/narebozimelikugejugabotez.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/m3iqle5b0uf2joisj2lqlja1co/1709238970.pdfIn PDF document text
    • https://adurucui.com/ckfinder/files/24128932028.pdfIn PDF document text
    • http://yummyschool.com/_UploadFile/Images/file/wusaxosilifozenebu.pdfIn PDF document text
    • http://dade666.com/userfiles/202109file/2021091312164570554.pdfIn PDF document text
    • http://olympicburger1988.com/uploads/files/33253828514.pdfIn PDF document text
    • https://hoya.hr/UserFiles/file/gamazilaninoferunami.pdfIn PDF document text
    • http://homeopathyhongkong.cn/files/nexavika.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/06f72ed021a68e5446c8d1dd6f995dd1/pumowetimowizotefat.pdfIn PDF document text
    • http://synergytaekwondo.com/click2buy_newp/userfiles/file/59177923943.pdfIn PDF document text
    • http://fqcycpa.com/jingkelun/userfiles/files/20210902174929.pdfIn PDF document text
    • https://www.lsv-wittlage.de/ckfinder/userfiles/files/28778959591.pdfIn PDF document text
    • http://sd-admin.fazendapenaazul.com/ckeditor/uploads/files/ratute.pdfIn PDF document text
    • https://home-consult.lu/userfiles/files/14614040102.pdfIn PDF document text
    • http://pet.nfe.go.th/m_site/ckfinder/userfiles/files/pukisisalazotozejinobap.pdfIn PDF document text
    • http://como.gattinonimondodivacanze.it/themes/userfiles/files/3285508444.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=download+euro+truck+evolutionPDF 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_off0000e8b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B4 18436 bytes
SHA-256: 42fc7dbd7e9b3a019168e589abae907432f319b191746c9ff3d6e6c21f2017a7
font_01_sfnt_off00011872.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11872 10540 bytes
SHA-256: 638c9474edd682edbfd942774ea0a97bde1565035f61a6851cb8335a2e55bc55
font_02_sfnt_off0001309d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1309D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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