Malicious PDF — malware analysis report

Static analysis result for SHA-256 690f1d24c28172c7…

MALICIOUS

PDF

94.7 KB Created: 2020-12-18 04:16:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: bfc82568bf195d4f4a1213a672fff3e1 SHA-1: 9097225f9c2cf651b6e0cd1840f574c58adf3590 SHA-256: 690f1d24c28172c74e43e7c2f35eeecddf08907527d5567dafe46dd1692f697e
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. One of the primary external links points to a URL associated with a potential phishing or malicious campaign. While no scripts were explicitly extracted, the PDF structure and the presence of numerous external links suggest an attempt to redirect users to potentially harmful content or to manipulate search engine results. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://traffine.ru/strik?utm_term=nolan+ryan+memorabilia+price+guide PDF link annotation
    • https://pigogokeda.weebly.com/uploads/1/3/1/8/131857695/5813424f593ac5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494146/normal_5fb487b1f302f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387582/normal_5fca8b63891b4.pdfIn PDF document text
    • https://naxedomabaxa.weebly.com/uploads/1/3/1/6/131606472/lunesomovafomuw.pdfIn PDF document text
    • https://dopijixofovaje.weebly.com/uploads/1/3/4/6/134692352/1945663.pdfIn PDF document text
    • https://ximilebikunupi.weebly.com/uploads/1/3/4/8/134875253/8602529.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/welutizenop/creme_fraiche_publix.pdfIn PDF document text
    • https://s3.amazonaws.com/tudawufed/snapchat_score_hack_online.pdfIn PDF document text
    • https://s3.amazonaws.com/xoxaneral/centroid_and_centre_of_gravity.pdfIn PDF document text
    • https://s3.amazonaws.com/sakaburepagase/harassment_police_report_nyc.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/siginowazuvep.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc565e860f2895dc105f20e/t/5fcf64bd10aae77571704b5c/1607427261828/my_photo_lyrical_video_status_maker_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20a6fb76-6b21-4be5-88bd-b63ab41f54eb/jexezotaru.pdfIn PDF document text
    • https://s3.amazonaws.com/midipes/purukovepinidosexiw.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010f90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F90 5228 bytes
SHA-256: 64c0aae1a22996fc8c71ba1ec4d9544b706bc4aab32e091f62702e982f127212
font_01_sfnt_off00012137.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12137 12372 bytes
SHA-256: 5a1256f558684b554b3006911f228a31ba90e5ea23b7d8fd0b2232eca6984e9d
font_02_sfnt_off000149ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149CE 16204 bytes
SHA-256: 541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501
font_03_sfnt_off00015efc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15EFC 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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