Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfa738260922ac8a…

MALICIOUS

PDF

71.3 KB Created: 2021-03-23 08:44:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 411e2835689ddaf08639a49f3cac5411 SHA-1: 9030ba9618bba1366fa9d2a3e6723077ab3d215e SHA-256: dfa738260922ac8a4ee56bef204c2596ee518dbb2bf7374bade93f112d7e1c35
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://vilenefex.ru/wix?keyword=soleus+air+manual+lx+140 PDF link annotation
    • http://mizebojusur.mypressonline.com/19620992536.pdfIn PDF document text
    • http://felesatediz.medianewsonline.com/octavia_butler_bloodchild_afterword.pdfIn PDF document text
    • http://mafonofolifeda.22web.org/fofezebefoberexozu.pdfIn PDF document text
    • http://jakusavu.sportsontheweb.net/7806707135.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455669/normal_6010ef8ac463f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367922/normal_602928b27a268.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422912/normal_5feb3299a5e18.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371244/normal_603a0b05abe2a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369920/normal_6029a34f2784a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/25ba9c6a-9d25-43aa-bfdc-67d62b672ea8/jajodesuso.pdfIn PDF document text
    • http://feluwagosipo.rf.gd/life_science_grade_11_study_guide.pdfIn PDF document text
    • http://lerezivopo.rf.gd/pubenakajuraxasuloza.pdfIn PDF document text
    • http://wiwawilif.epizy.com/bluetooth_software_windows_7_ultimate_free.pdfIn PDF document text
    • http://bugenerefajujus.atwebpages.com/33583982861.pdfIn PDF document text
    • http://roporuti.onlinewebshop.net/penuruwudo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85c435b0-4dcc-4b14-a500-5c4e69c1985e/givezokinufidonewis.pdfIn PDF document text
    • http://faxumodud.epizy.com/the_magicians_season_5_wiki.pdfIn PDF document text
    • https://s3.amazonaws.com/xufujofaleki/63019112409.pdfIn PDF document text
    • https://s3.amazonaws.com/zafijukopa/12039969180.pdfIn PDF document text
    • http://pevubisexifizo.rf.gd/guide_taille_chaussure_adidas_bebe.pdfIn PDF document text
    • https://s3.amazonaws.com/legobegutulo/church_newsletter_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/gurafoga/html_form_without_csrf_protection_php.pdfIn PDF document text
    • http://fofomekurun.rf.gd/botikukidefupiruzulu.pdfIn PDF document text
    • https://s3.amazonaws.com/sajezife/16920329721.pdfIn PDF document text
    • http://vipowiso.epizy.com/weber_grill_lowes_coupon.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_off0000d757.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD757 5284 bytes
SHA-256: f3eb5a4d96a62e343828a507439134a4376a77736d88d52935a138e047d3ecd7
font_01_sfnt_off0000e93e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE93E 11144 bytes
SHA-256: b6cdcd2d07c3a8cfbc4e9f59c3f624a78df26fabe4ae3ce34cd96af32a5cf9db

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