Malicious PDF — malware analysis report

Static analysis result for SHA-256 38f95bd7e5b1243e…

MALICIOUS

PDF

80.8 KB Created: 2021-03-28 04:28:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: af63c4201c55c97b1befcdb21982d71b SHA-1: 1748b617676dab9351c1f6d699cc5b8cf58901de SHA-256: 38f95bd7e5b1243e909d07a24df53e2e085869b29bd22f3633dcb0722454f49f
96 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for SEO spam or phishing. The ML classifier strongly indicated maliciousness, and the presence of embedded URLs suggests an attempt to redirect users to potentially harmful sites. While no scripts were explicitly extracted, the PDF structure and embedded links point towards a malicious intent, likely related to phishing or scamming.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • 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://ponafet.ru/strik?utm_term=where+can+i+buy+tracfone+smartphone+cards PDF link annotation
    • http://whowill.ru/misobobofuguz0oxo9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411503/normal_604d2e6886351.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481058/normal_6004e19f43f06.pdfIn PDF document text
    • http://helpverifedbadges.com/1579017463xhvqp.pdfIn PDF document text
    • http://itayoga.space/xorebugilexafozuvenaplduc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464995/normal_5fcecfae9a1d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389358/normal_600f7e6321aea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368506/normal_605fb63b90dc4.pdfIn PDF document text
    • https://goxejebifebiv.weebly.com/uploads/1/3/2/6/132682819/zokijojup-pavofofapatoko-xodubotabeveda.pdfIn PDF document text
    • https://lamuwopinu.weebly.com/uploads/1/3/4/6/134632291/funogiweribokuf_mewugoxixaf_womuvu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4528876/normal_60335fe437e50.pdfIn PDF document text
    • https://xiruzukigipimog.weebly.com/uploads/1/3/4/8/134865515/3860346.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393624/normal_6010d9caa2b62.pdfIn PDF document text
    • http://banquepopulaire-fr.org/tobawonadovuvisufgbp4u.pdfIn PDF document text
    • http://olipaka.xyz/82871144268g4clz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://toxejitopab.epizy.com/formula_1_calendario_2020_horarios_argentina.pdfIn PDF document text
    • https://s3.amazonaws.com/julaxel/win_7_activator_daz.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwotarotavuz/what_degree_to_get_for_project_management.pdfIn PDF document text
    • http://dexidije.epizy.com/38525387680.pdfIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/zaterinum.pdfIn PDF document text
    • https://s3.amazonaws.com/xeponodij/32817378407.pdfIn PDF document text
    • https://s3.amazonaws.com/rekawexuretowo/fogezirupo.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_off0000fcbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCBB 5616 bytes
SHA-256: 1ab3902a63de4dffd70402350917442daee4ddb7042510e6c331e8d865155a76
font_01_sfnt_off00010fbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FBC 11240 bytes
SHA-256: 5bd2d510926fd013dd2e3dfb26c39700a95cf05c8caebd9eb2cb4c3af2d13425

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