Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e7a1f26c435bc61…

MALICIOUS

PDF

74.8 KB Created: 2021-02-19 18:04:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 42394b47b2194b0672085437c3c6bab0 SHA-1: 1ef5b09caf61c4b9c4d2327cb50ab12ae0999fe8 SHA-256: 9e7a1f26c435bc618edaa8ad339bb0d233e5f1d84c786361dfd3ed995d1c4d96
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with several pointing to known malicious redirectors and link farms. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or SEO spam. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/123?utm_term=are+charmglow+grills+any+good In PDF document text
    • https://tiwilofudux.weebly.com/uploads/1/3/1/6/131606348/37f4065455d41b.pdfIn PDF document text
    • https://doxefifuz.weebly.com/uploads/1/3/0/9/130969363/30262c8d77300.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369633/normal_5fc9853a43784.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451368/normal_5fe0603c2197c.pdfIn PDF document text
    • https://sovanomi.weebly.com/uploads/1/3/5/3/135337195/5651135b1ef03e.pdfIn PDF document text
    • http://jusepufuwexak.iblogger.org/construction_laborer_resume_template.pdfIn PDF document text
    • https://kevulukopefot.weebly.com/uploads/1/3/1/4/131453006/1266580e11d5d6f.pdfIn PDF document text
    • http://topvideo.design/rimworld_insect_meatai19i.pdfIn PDF document text
    • http://chambrehub.xyz/bodoni_book_font84ez7.pdfIn PDF document text
    • http://pixerofojoka.22web.org/zanufejetovut.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jidosatikim/26566935538.pdfIn PDF document text
    • https://s3.amazonaws.com/zamuriza/husky_dog_breed_information.pdfIn PDF document text
    • https://s3.amazonaws.com/lupebesu/vurujewerufevo.pdfIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/jidawerabelikolizosesulef.pdfIn PDF document text
    • http://mumupaju.epizy.com/64172295631.pdfIn PDF document text
    • http://pagupim.epizy.com/what_gnosis_mean.pdfIn PDF document text
    • http://sotemapepuko.epizy.com/hill_climb_bike_racing_game_apkpure.pdfIn PDF document text
    • http://nolivajujereram.rf.gd/macmillan_english_6_teacher_s_guide.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_off0000e767.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE767 5536 bytes
SHA-256: 74a60e93a1fd922bb8fabfa01717e2a7be39ed9b55900bbfbf0454c85ae3654e
font_01_sfnt_off0000fa24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA24 10428 bytes
SHA-256: b4bd8f1f14c278b4f0d6da1ccb146eade51a3f50accb7fce5bd6465e346f9e67

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