Malicious PDF — malware analysis report

Static analysis result for SHA-256 132d4ba94d0ab8b2…

MALICIOUS

PDF

78.0 KB Created: 2021-05-27 03:32:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 68e28fff49b706b6987da583d9f89b81 SHA-1: 949ab73389d005e6a40ce2fb5609aff000b059ec SHA-256: 132d4ba94d0ab8b2935a8769307e8480525dd4ad2692c8ed82c2e9c865c51908
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or phishing operation. The primary URL identified, 'https://zajinet.ru/strik?utm_term=how+to+set+low+battery+warning+on+iphone', indicates a lure related to iPhone settings, likely to trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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.
  • 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://zajinet.ru/strik?utm_term=how+to+set+low+battery+warning+on+iphone PDF link annotation
    • https://kimonasisu.weebly.com/uploads/1/3/5/4/135400987/5870166.pdfIn PDF document text
    • https://lemamoramu.weebly.com/uploads/1/3/5/3/135348447/vosabumibarajet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409114/normal_604d1fb5a4711.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455642/normal_60651c199dd3a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415934/normal_5ffb14b00628b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450632/normal_60402f2945b60.pdfIn PDF document text
    • https://tegomufowake.weebly.com/uploads/1/3/5/9/135958876/387995.pdfIn PDF document text
    • https://dotadokox.weebly.com/uploads/1/3/4/8/134883209/7488449.pdfIn PDF document text
    • https://wizaxonaguwaxi.weebly.com/uploads/1/3/4/3/134306690/pibodiwizinavitot.pdfIn PDF document text
    • https://nekazadezi.weebly.com/uploads/1/3/4/6/134662300/famapej_bojod.pdfIn PDF document text
    • https://gurelupukuji.weebly.com/uploads/1/3/0/7/130775622/junaxikako.pdfIn PDF document text
    • https://fepamevar.weebly.com/uploads/1/3/7/5/137509884/bipato-zuger.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/7dfc804f-4032-4a62-bffd-48ff50e0add0/driver_booster_7.4.0.721_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5d7a4e9-47db-42aa-adef-a87dab466e01/midi_to_mp3_converter_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8d6575f-cab3-4016-bc60-81cc29c17755/kikasajet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b44ccb1f-980b-40f7-a647-10edc2d0fa9b/rejigutoxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5517032c-94a7-4b34-904e-1f813c4088d2/87971453506.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bb68072-e54b-4ad4-b9ee-19510edb4097/is_a_phd_worth_it_reddit.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_off0000f30c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF30C 5376 bytes
SHA-256: f94cf8527a52833cea47b6139d2d222a231d521922a60e5c6c317d2ea30de144
font_01_sfnt_off0001055e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1055E 10828 bytes
SHA-256: f3637842c59603f494cc236ddff67374b4df97602ffc803b8c8b9670bc89dcb6

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