Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ab7e7615db5fb11…

MALICIOUS

PDF

92.4 KB Created: 2021-02-22 10:11:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 64950c011c4d470195b1b507c50165ab SHA-1: d14a6fb151f52645e9c803d9d64939d509aaa71a SHA-256: 6ab7e7615db5fb11a1e4169680b65d219bd7249ec93dc9497b14c669cbeea748
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains a link to a known malicious redirector, `https://crophysi.ru/strik?utm_term=samsung+galaxy+note+3+screen+replacement+price+in+nigeria`, which likely leads to a phishing page or malware download. The document also functions as a link farm, pointing to numerous other PDF files, suggesting a coordinated effort to distribute 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://crophysi.ru/strik?utm_term=samsung+galaxy+note+3+screen+replacement+price+in+nigeria In PDF document text
    • http://mejafibeves.iblogger.org/96312882647.pdfIn PDF document text
    • http://meetcabinets.xyz/90372907682hz5wq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414687/normal_600a5fd4d7bec.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471513/normal_5ff669dbb2da4.pdfIn PDF document text
    • https://tidepobowajaxuk.weebly.com/uploads/1/3/0/8/130814761/8183539.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381287/normal_6003eb3f75a48.pdfIn PDF document text
    • http://fastnoutservice.ru/kibivomojukiduwa049xb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426816/normal_60017656b7fcc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417040/normal_60044946e522d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454303/normal_601a3914513ff.pdfIn PDF document text
    • http://helplnstagramoffice.com/peg_perego_primo_viaggio_washing_instructionsu58jk.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/wuwabobujasivor/watadirela.pdfIn PDF document text
    • https://s3.amazonaws.com/nolarifaforuxop/bitumen_extraction_test_procedure.pdfIn PDF document text
    • http://futifuzofu.rf.gd/75965038965.pdfIn PDF document text
    • https://s3.amazonaws.com/fotepopunaj/linkedin_bio_template_for_students.pdfIn PDF document text
    • https://s3.amazonaws.com/dumupa/84257810715.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_off000129b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129B4 5688 bytes
SHA-256: 7746b19e0383a1a935af797ef54315a7c29e029bbf697399e40602a71fcf3957
font_01_sfnt_off00013d10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D10 11312 bytes
SHA-256: 017ef614e0d3cd936fd6ab8fe0726a356e36f8a2bb777029d004ca5bc84d0817

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