Malicious PDF — malware analysis report

Static analysis result for SHA-256 e09a25d6411619a9…

MALICIOUS

PDF

68.3 KB Created: 2020-12-23 02:29:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8bc1fefa1c77d5024783e7bc4bd35431 SHA-1: 96661760b9817913a165e229dc06b5db447ae001 SHA-256: e09a25d6411619a9880206e3f4d9b1c13450e09eb3cd162f6288c2e5d060ea07
214 Risk Score

Malware Insights

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

This PDF file contains a link farm and a redirector URL, indicating a phishing or malware distribution attempt. The document body, though heavily obfuscated, appears to be a lure related to 'Jio 4g recharge plan gujarat'. The presence of numerous embedded links, including a malicious redirector, strongly suggests an intent to direct users to malicious sites. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://cctraff.ru/strik?utm_term=jio+4g+recharge+plan+gujarat
    • https://sifajovu.weebly.com/uploads/1/3/4/8/134874608/fc44f6.pdf
    • https://cdn-cms.f-static.net/uploads/4374851/normal_5f8ca3e13c60a.pdf
    • https://luzonenof.weebly.com/uploads/1/3/4/5/134509067/9e52a86ee6c6.pdf
    • https://natizupasa.weebly.com/uploads/1/3/1/4/131437725/0f22748d1392.pdf
    • https://cdn-cms.f-static.net/uploads/4414688/normal_5fd794a7df503.pdf
    • https://fuparududewon.weebly.com/uploads/1/3/1/8/131856041/674536.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/29a6d434-bf55-4743-bbe9-25db2fc19cbf/gakajijufavawodizad.pdf
    • https://uploads.strikinglycdn.com/files/cc394527-5108-41f3-8aab-521a14d85e87/their_eyes_were_watching_god_research_paper_topics.pdf
    • https://uploads.strikinglycdn.com/files/497c39a2-c3c0-41b8-85d8-3cb23ef927db/bedudeterake.pdf
    • https://uploads.strikinglycdn.com/files/c3383cbd-47ba-4aaa-bef5-0e685076bd88/jovimibuvoxevefegomukoba.pdf
    • https://s3.amazonaws.com/vixuwogetiv/areas_and_perimeters_of_shapes.pdf
    • https://uploads.strikinglycdn.com/files/1f4e5c34-1af5-4b66-b8f3-f1e6aa372728/refaralevavinun.pdf
    • https://uploads.strikinglycdn.com/files/601e1f3c-31bb-4e1d-b19e-10082a82b99d/50973785342.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf2f.bin
6860af7defe9d58af93abb8c6148a2358eabe4d337464ee1b5530f745e19faf1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCF2F 5168 bytes
font_01_sfnt_off0000e0d3.bin
dbdb8c3aa6a37be29f9afdf53b52ba54d8543d8296b5841d140fea4681f11538		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE0D3 10464 bytes

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