Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a7fa866dcbaa2a7…

MALICIOUS

PDF

71.6 KB Created: 2020-11-24 02:04:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 1ae0479c201abed4eefe23dc160c3a0b SHA-1: 9118297052a37ab3e9ef87ebb07e9896624ae5e0 SHA-256: 4a7fa866dcbaa2a74f2488fec59282e3056b291fd11edac8289d23b60a0b0d17
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 0.9997

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://traffnew.ru/strik?utm_term=lord+of+the+flies+vocabulary+chapter PDF link annotation
    • https://xikosenazegan.weebly.com/uploads/1/3/0/7/130739601/9177866.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369506/normal_5f9f7cfd45b0f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368997/normal_5f911c367ed17.pdfIn PDF document text
    • https://saxibodusazo.weebly.com/uploads/1/3/0/7/130740440/8057360.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404514/normal_5fbc0a2c7c431.pdfIn PDF document text
    • https://zipazoraxegav.weebly.com/uploads/1/3/4/3/134325660/ffa4204d3d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414847/normal_5f960f660f024.pdfIn PDF document text
    • https://nisutezobeta.weebly.com/uploads/1/3/4/4/134486685/1817883.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
    • https://s3.amazonaws.com/padoragog/el_credo_cataro.pdfIn PDF document text
    • https://s3.amazonaws.com/nisoxow/29275545951.pdfIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/98582004185.pdfIn PDF document text
    • https://s3.amazonaws.com/bajapovogam/hospital_pharmacy_author_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/liguwubore/37638596352.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_off0000ce08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE08 5264 bytes
SHA-256: 8540b918ebf2dd1d1311906b81783465b10fccb721ab36a23dfeb55ad0182f02
font_01_sfnt_off0000e00c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE00C 9684 bytes
SHA-256: 81a9d505b2a205c0186f0e45921c24df20e1e7f65fbf6d2684906c86943877d8
font_02_sfnt_off0001011f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1011F 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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