Malicious PDF — malware analysis report

Static analysis result for SHA-256 98e5c33b120f030c…

MALICIOUS

PDF

110.2 KB Created: 2021-03-25 15:27:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 03760c5d32c8617463c245d83ee19d82 SHA-1: 0b53318242dbaeadd930a8f7a9339842f0370bcc SHA-256: 98e5c33b120f030caf0ab631842e5c17f9ea155832b3389303f321924106c697
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable hosting and are flagged as part of a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically phishing. While no scripts were directly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://druttle.ru/award?keyword=anestesia+en+aneurisma+de+aorta+abdominal+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4366306/normal_5fdef0910c244.pdfIn PDF document text
    • http://maleev.online/how_to_use_my_sewing_machine4awrs.pdfIn PDF document text
    • http://on-arenas.com/rerononepodavapulejebirxw1u.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387826/normal_603560a75b244.pdfIn PDF document text
    • http://setopin.mypressonline.com/kozakulijaforafulew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487191/normal_604036d9b9868.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407306/normal_604059a776c17.pdfIn PDF document text
    • http://vadosixajobirug.mygamesonline.org/bescherelle_poche_conjugaison.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501233/normal_600b524c1d74d.pdfIn PDF document text
    • http://tuzirawejaw.mypressonline.com/wuwiraz.pdfIn PDF document text
    • http://botanilix.mygamesonline.org/rolokagojab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416786/normal_6021fa2b6da66.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418171/normal_5fd3befea80e9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411691/normal_6000139f86ccc.pdfIn PDF document text
    • http://stopnutristrike.ru/75878791711pu4d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481408/normal_605b4041b4247.pdfIn PDF document text
    • http://airbin.top/firojagovohtbbr.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462697/normal_60173feada37f.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/napoledunadigo/when_you_wish_upon_a_star_piano_notes.pdfIn PDF document text
    • https://s3.amazonaws.com/muwemivumazulax/invitation_templates_wedding_anniversary.pdfIn PDF document text
    • https://s3.amazonaws.com/rujabepifar/un_puente_hacia_terabithia_ver_online_espaol.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016851.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16851 1572 bytes
SHA-256: e88443b14e86e4d13991448cb855da87db39bf6dffcfcd92cd5b657ce7a18dc3
font_01_sfnt_off00017055.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17055 5316 bytes
SHA-256: 751b41718f810bf855bba1ce49b70f559e328c76669e72bc1db33eca778bd279
font_02_sfnt_off0001824b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1824B 12588 bytes
SHA-256: ee43293b145a18038d22315ece16692360e469edb6f11249d4b78778ed48fbc0

Open this report in the interactive analyzer, or submit your own file for analysis.