Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc36fe2aa4d424ce…

MALICIOUS

PDF

77.5 KB Created: 2021-01-15 14:58:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 555b4397fb32cf3167e0e7636ad69ce6 SHA-1: 67a0e4c0498a57bac9de47f0be6443bdd11cf58e SHA-256: fc36fe2aa4d424ce4ca4674694a581bcb36336484bb5947766a25f7443770bbf
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to PDF files hosted on various platforms, suggesting a link farm or redirection mechanism. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of techniques used to redirect users to malicious sites.

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://trafftec.ru/aws?utm_term=level+11+94+percent+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379377/normal_5f9c65a43a7c2.pdfIn PDF document text
    • https://worozimovazez.weebly.com/uploads/1/3/1/4/131406108/vamidosi-mevakitusoxosa-zozigeg.pdfIn PDF document text
    • https://zogijemomisun.weebly.com/uploads/1/3/4/4/134488733/bomijaxubepope-zedir.pdfIn PDF document text
    • https://vepimogarib.weebly.com/uploads/1/3/4/8/134856589/221032.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413969/normal_5fef81054f854.pdfIn PDF document text
    • https://site-1178049.mozfiles.com/files/1178049/38962960149.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370989/normal_5f961fd9087bf.pdfIn PDF document text
    • https://site-1174864.mozfiles.com/files/1174864/vumijijadifito.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/henghuili-files2/gelobokuxirifepelexip.pdfIn PDF document text
    • https://s3.amazonaws.com/lupuvogotog/chunari_chunari_full_hd_video_song.pdfIn PDF document text
    • https://s3.amazonaws.com/kopisigapub/12050610229.pdfIn PDF document text
    • https://s3.amazonaws.com/donarepemi/activate_win_7_professional_64_bit.pdfIn PDF document text
    • https://s3.amazonaws.com/lewuli/mh_cet_2019_mba_application_form_date.pdfIn PDF document text
    • https://s3.amazonaws.com/fadupazageraf/xelegakitijilexulir.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC6F 5316 bytes
SHA-256: be89ad7c49918c356fd5e529aa7a920b94e9128107956a3b13d2479f84b9130c
font_01_sfnt_off0000eeb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEB5 10632 bytes
SHA-256: 7ffe112f413dfea5a345ce3c275be9fb496958104f38463884d23f68114fe288
font_02_sfnt_off00011369.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11369 16312 bytes
SHA-256: 975089639afea594160f6daa1ae948ffc4125994d61a9fd32dce02580f7b6b15

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