Malicious PDF — malware analysis report

Static analysis result for SHA-256 a465ed0cd719fbdf…

MALICIOUS

PDF

73.7 KB Created: 2021-05-17 09:16:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 72517c02b619d7e76977ac73fbdad54e SHA-1: 3fb87ea913ba34d511f7d75416054ae782edb19b SHA-256: a465ed0cd719fbdfa17e034865209253d44dafc470cfefdbddcfd75c5c28de00
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, identified as a link farm, suggesting an attempt to direct users to malicious websites. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically phishing. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document designed to lead users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://xezojetit.ru/strik?utm_term=dream+interpretation+snakes+in+water PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4392218/normal_5fe15e78d88c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372080/normal_601c952a95901.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446035/normal_5fe5723453dc7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407066/normal_60295e142c2b2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453550/normal_5fef6c4e3c459.pdfIn PDF document text
    • https://weruvuwixaxo.weebly.com/uploads/1/3/5/9/135972833/nazumato-lenorir-tinitakemo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451212/normal_6004306f42776.pdfIn PDF document text
    • https://vasoderavir.weebly.com/uploads/1/3/4/7/134728489/jugadalazodisus.pdfIn PDF document text
    • https://burazukukoxuvi.weebly.com/uploads/1/3/4/0/134096138/4922771.pdfIn PDF document text
    • https://xafudilolara.weebly.com/uploads/1/3/4/7/134744509/fekab_wivopozet_nadoxe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4505771/normal_604de428a15da.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450502/normal_60063991590e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424646/normal_605a685a61230.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474206/normal_5fecc4e5134c1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420238/normal_5fdef42e0d8ac.pdfIn PDF document text
    • http://sagiberufof.22web.org/geforibidezasuje.pdfIn PDF document text
    • https://kumajevebak.weebly.com/uploads/1/3/1/8/131856027/a5395.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f766a7e9-a0d0-4e3a-bf7c-946d2e8c2ff4.filesusr.com/ugd/bddb96_6ed11dfdc68042a4ba404986819fcab1.pdf?index=trueIn PDF document text
    • http://zopogapusokudip.rf.gd/29589039536.pdfIn PDF document text
    • http://lurebilowate.rf.gd/baixar_jogos_completos_android.pdfIn PDF document text
    • https://f9a132f0-acc9-4761-b7d8-38025aedd849.filesusr.com/ugd/5c71d6_2a58fd54c9b443e4b2c2aec5efcff696.pdf?index=trueIn PDF document text
    • http://pemopewepubik.rf.gd/43758378819.pdfIn PDF document text
    • https://466f9527-ada3-48b4-ac0c-4ba5546996ca.filesusr.com/ugd/a4b6b9_615e63c12ed446da8874c35af82a4936.pdf?index=trueIn 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_off0000e4e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4E1 5088 bytes
SHA-256: abd9307f122947f3c398cafd3d88deaa54c59a4817584c3050f7f246ac6e09a9
font_01_sfnt_off0000f62f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF62F 10648 bytes
SHA-256: fd0819ad66ef780bd7201ef6bde85625e47fe891dadb4d38e974eb2cf09448ce

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