Malicious PDF — malware analysis report

Static analysis result for SHA-256 711069ea5acb5768…

MALICIOUS

PDF

73.9 KB Created: 2021-02-25 08:49:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: f3bf28c0c4387b43d47179eec5d6ce08 SHA-1: d031972d41aff9480775a7a15889e4a26181b241 SHA-256: 711069ea5acb576814c4496ef1f7aafa16308afa962fa80b5e514cb16d9cedb2
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jottigo.ru/123?utm_term=is+ben+hardy+married PDF link annotation
    • https://mijezuri.weebly.com/uploads/1/3/0/9/130969422/lajuxawewesogexuxop.pdfIn PDF document text
    • https://vanufutalolu.weebly.com/uploads/1/3/1/1/131164160/naximuwolurijaj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414172/normal_60266f1946a67.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413578/normal_601e147284108.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375521/normal_5ff2cb0ec3b4f.pdfIn PDF document text
    • https://gejodawutu.weebly.com/uploads/1/3/1/1/131164152/vuguzume.pdfIn PDF document text
    • https://fikadodovawewa.weebly.com/uploads/1/3/4/3/134320255/tegederexifoxo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369656/normal_5ff13fb9ef43b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408992/normal_60013482195f3.pdfIn PDF document text
    • https://cdn.sqhk.co/sirepajaku/ijiahae/71832875625.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471106/normal_5fe0c9f548e49.pdfIn PDF document text
    • https://cdn.sqhk.co/dirodivive/c7OrWcO/versatile_computer_meaning_in_urdu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bifovigavij.myartsonline.com/what_country_is_the_sun_rising_in_right_now.pdfIn PDF document text
    • https://s3.amazonaws.com/zuguvoxoki/35078532315.pdfIn PDF document text
    • https://s3.amazonaws.com/fadobirak/62400415157.pdfIn PDF document text
    • https://s3.amazonaws.com/zifilobesumafi/las_brujas_no_se_quejan_libro.pdfIn PDF document text
    • https://s3.amazonaws.com/dugibabafod/estar_present_form.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_off0000e45e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE45E 5212 bytes
SHA-256: bcad490830fed0e30be1d68526a0819903d7b562ff16a106d34d1a06a6418e9f
font_01_sfnt_off0000f5e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5E9 10624 bytes
SHA-256: 54200366235d5077b3bf562cda182398e19fc57071cba7742dd8cd287ea8b511

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