Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f197e8e57fedd60…

MALICIOUS

PDF

92.0 KB Created: 2021-02-24 11:37:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 010f41f74b94536104a590e4e3311d62 SHA-1: 5c9fdc97356a504ee27b196651cb42cb4dda7f7a SHA-256: 1f197e8e57fedd60adf3caea8bb7ed37192e96effbf407723606bd56f46c95dd
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs disguised as search results, a common tactic for distributing malware or phishing content. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful sites, likely as part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 https://bologen.ru/wb?keyword=john%20grisham%20books%20in%20order%20of%20popularity PDF link annotation
    • https://cdn.sqhk.co/tadeketoxab/dBsIL05/roblox_promo_codes_2020_not_expired_november.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413000/normal_6008460145d37.pdfIn PDF document text
    • http://mydenverneighborhoods.com/909271434566t2go.pdfIn PDF document text
    • http://reduslim-ufficiale.website/30406609475rj89.pdfIn PDF document text
    • http://nubebukexowi.66ghz.com/33977156340.pdfIn PDF document text
    • http://aycotoro6.xyz/geloxuladomaxedejop5s2vl.pdfIn PDF document text
    • http://afracheat3.xyz/7471500163322hsu.pdfIn PDF document text
    • http://nikecortez.net/huanyang_110v_1.5_kw_vfd_manualpoxt7.pdfIn PDF document text
    • http://nifajukopo.iblogger.org/what_does_parallel_lines_mean_in_photography.pdfIn PDF document text
    • http://wedavinonuvovu.22web.org/kawaii_anime_girl_wallpaper_android.pdfIn PDF document text
    • http://latencfsrt.space/pugipigirupoganoa8510.pdfIn PDF document text
    • http://centerbluebadge.com/66794603583wn4nr.pdfIn PDF document text
    • http://bonus332.site/also_sprach_zarathustra_scoreg8mbv.pdfIn PDF document text
    • http://ru-en.xyz/5085511331ex0il.pdfIn PDF document text
    • http://mexicotop.xyz/motorola_xpr_6550_programming_software_downloadga7mq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469375/normal_6025db33a0d3a.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://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_off00011b94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B94 5632 bytes
SHA-256: 6fd899e4d4d6a8566a42acbb161675cb20f2f264741afdc3dcb0a685d85ac5b5
font_01_sfnt_off00012e8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E8B 11312 bytes
SHA-256: 9cbe496e94b8c7b6ff316d33fbf96b3c8517647c775a34a037602d2bd2dbe473
font_02_sfnt_off00015470.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15470 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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