Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9832e7e4762c9b7…

MALICIOUS

PDF

73.8 KB Created: 2021-03-03 17:34:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 6c730c132a27946b77b50c5c275de97c SHA-1: f641a0dfc427ae6adabc9632d8ae1fd5b3c6b97e SHA-256: b9832e7e4762c9b793a78f6ebfc3a17ef3a6fb9c4278805e96260d49711b831d
156 Risk Score

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 link farm, suggesting a malicious intent to redirect users to potentially harmful websites. The ClamAV detection and ML classifier strongly indicate malicious content, specifically a phishing or trojan distribution. While no scripts were directly extracted, the PDF structure and embedded URIs point towards a spearphishing attachment designed to lead users to a malicious site.

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://fokemale.ru/strik?utm_term=ge+xl44+range+troubleshooting PDF link annotation
    • https://xolesozetenosox.weebly.com/uploads/1/3/1/0/131070434/ee34064.pdfIn PDF document text
    • https://ximavubakalik.weebly.com/uploads/1/3/0/7/130776508/951391.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371508/normal_6005d9183cf07.pdfIn PDF document text
    • https://kemavejikokawi.weebly.com/uploads/1/3/2/3/132303077/rewodolo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498882/normal_5fcb9fc05d760.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454691/normal_600b977cddc89.pdfIn PDF document text
    • https://kijomexed.weebly.com/uploads/1/3/1/0/131069838/64261.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/sirilagewuga/46395955368.pdfIn PDF document text
    • https://s3.amazonaws.com/xeruxaxer/mlsu_private_form_date_2019-_20.pdfIn PDF document text
    • https://s3.amazonaws.com/daraniwekamidir/65076788011.pdfIn PDF document text
    • https://s3.amazonaws.com/mokuwanibof/chirunavvutho_movie_songs_free_320kbps.pdfIn PDF document text
    • https://s3.amazonaws.com/rimepusox/oneplus_3t_android_10_reddit.pdfIn PDF document text
    • https://s3.amazonaws.com/xutomoxu/brake_caliper_guide_pin_sleeve.pdfIn PDF document text
    • https://s3.amazonaws.com/wulagisi/6252895485.pdfIn PDF document text
    • https://s3.amazonaws.com/dalava/beethoven_piano_sonata_no._14_sheet_music.pdfIn PDF document text
    • http://nakeviw.myartsonline.com/20932539514.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwenoxuzasila/washington_state_football_coaches_history.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_off0000e59d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE59D 5272 bytes
SHA-256: df8f4ceae002f1a817dc816c350abfa1277c7a3afb577076ef55b7a4ca152383
font_01_sfnt_off0000f792.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF792 10184 bytes
SHA-256: a83d15ccd6421793e0a7e000ddde4ef403a66dd6331015abd338ba333c16bbb5

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