Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddc65340eddba48c…

MALICIOUS

PDF

68.2 KB Created: 2020-12-19 13:59:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 702d9653f8754f7eb194db563e9fb6da SHA-1: 9bf0cd59358f6ea2f6e3f179969a71e613d63e04 SHA-256: ddc65340eddba48c96256c9067294332dafed316c723e5896a30c54560bfcc15
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with at least one identified as a malicious redirector. The heuristic firings indicate the PDF is designed as a link farm, directing users to potentially harmful content. The ClamAV detection and ML classifier further support its malicious nature, likely for phishing or malware distribution.

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://traffking.ru/strik?utm_term=legal+guide+for+police+constitutional+issues In PDF document text
    • https://netevidogewe.weebly.com/uploads/1/3/4/7/134715311/5849998.pdfIn PDF document text
    • https://vabejodero.weebly.com/uploads/1/3/4/3/134378136/rukel.pdfIn PDF document text
    • https://nibojesuko.weebly.com/uploads/1/3/4/3/134329062/34d3e8010bb507.pdfIn PDF document text
    • https://menerixejujup.weebly.com/uploads/1/3/4/6/134605313/3b734f.pdfIn PDF document text
    • https://wotigutaz.weebly.com/uploads/1/3/4/3/134361511/lazejimovuwe.pdfIn PDF document text
    • https://neliwoxe.weebly.com/uploads/1/3/4/8/134871618/wizalewirodagipa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc7b6b35426f52a30e0c35c/t/5fc88ca9ec83506b047d41c8/1606978729769/porib.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc64d6d2e537a05ef2dd678/t/5fcb0314190ee82df8d54263/1607140118052/25440981549.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8dfff093-846d-40bb-a098-2bd85e3bb2df/26456251592.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d36f6c6a-a363-47e8-af22-8ca3216c86fc/shadow_of_the_colossus_speed_king_trophy_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e83fbec-d83a-4797-8d89-9c23eedea820/the_sweetest_taboo_lyrics.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc58f3da87939686427c656/t/5fcd6c6e83d2ac65cc2784e1/1607298158239/pay_express_lane_california.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d7dc3dfdd95b60d4c91c/t/5fc30578f81c9a2a0c05d102/1606616441704/tudejupalubopag.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e08512facd59ceacd9cd/t/5fc3aab9f81c9a2a0c122e31/1606658745850/lagupukipubur.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_off0000cb80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB80 5264 bytes
SHA-256: b2d5522b545a70fc4a522be3a942471dfdd6cf1cd11c70bbba04b5396e6c6e9e
font_01_sfnt_off0000dd7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD7D 11156 bytes
SHA-256: 08e6746bdea0180d8b846e9115e9d7a111f4e249297d89b395f519d8b8db8ba3

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