Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc1b4f1261a7d13b…

MALICIOUS

PDF

69.6 KB Created: 2020-11-24 19:58:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 5f8557e9cabb1ec688633836dd121873 SHA-1: 44ba51fa4cfcacd4f8bb522002c02910a7ee5e5c SHA-256: bc1b4f1261a7d13b9c5ff37f11b8f2cd3247a975a9709ee9e51f3c88218e3ee3
244 Risk Score

Malware Insights

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

This PDF document is classified as malicious due to its extensive use of link farms pointing to potentially harmful infrastructure. The document body, though obfuscated, contains a lure related to "Act 3 scene 1 julius caesar summary" which is used to disguise the malicious intent. The presence of numerous embedded links, including one to a known malicious redirector, strongly suggests an attempt to lead users to phishing or malware-hosting sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/123?utm_term=act+3+scene+1+julius+caesar+summary In PDF document text
    • https://lugesivewamaxiz.weebly.com/uploads/1/3/4/5/134596289/zuzevasap_xulosa_tonuvogepi.pdfIn PDF document text
    • https://robonodibogiva.weebly.com/uploads/1/3/4/6/134630072/takevezegizozudaliv.pdfIn PDF document text
    • https://tuzuvujejoru.weebly.com/uploads/1/3/4/4/134442534/8152853.pdfIn PDF document text
    • https://nunogekir.weebly.com/uploads/1/3/4/5/134597520/7500f8b0bb4bb3.pdfIn PDF document text
    • https://vapufubewadul.weebly.com/uploads/1/3/4/4/134485241/pikifiroxevu.pdfIn PDF document text
    • https://pavowojavujide.weebly.com/uploads/1/3/1/3/131398322/buromiseme.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501804/normal_5fbc6c72bce96.pdfIn PDF document text
    • https://dubuzosokiboxof.weebly.com/uploads/1/3/1/1/131163723/441e43.pdfIn PDF document text
    • https://rizafoxuz.weebly.com/uploads/1/3/4/8/134852064/8de4fe94cd54614.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a5341f3-be71-425d-8a32-f180e8dc468b/paxigegibulokeludotej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad6ad96a-ce77-4d6c-9405-c69e8f7d1a65/unblocked_games_baseball_game.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd9206df-25a6-4c87-95ca-f6c7ac023644/75457427435.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80bd03ed-0f94-4fd9-ae39-99f09650dc38/48683237779.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/977ae478-174c-4814-a9f6-c3c76f796c2f/nosamewowizorujanewe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2700ab8-1fad-4d52-977e-bfe9abc11097/tibejozufefotovopi.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_off0000d5fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5FD 5328 bytes
SHA-256: db0dcce7f1c86888a0b91eea2fc2a24ca895d9296d3ff3c0f00e074e325093f2
font_01_sfnt_off0000e81c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE81C 9916 bytes
SHA-256: f2ad05a96cad0581152303b5d8b0e8a631de091c3511b4622b1b2bf8ef364f5c

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