Malicious PDF — malware analysis report

Static analysis result for SHA-256 a799f0cfe2021f5f…

MALICIOUS

PDF

69.7 KB Created: 2021-01-14 04:40:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 721c983088242425c04ec24f293512c5 SHA-1: ee52d34ee5bac2b649986a418dc4d50d0d7b665c SHA-256: a799f0cfe2021f5f88cb122487f89edfecc42408d5d6667b8ef1a705356997af
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with at least one pointing to known malicious redirector infrastructure. The heuristic firings indicate a malicious redirector and a link farm, suggesting the primary purpose is to direct users to potentially harmful sites. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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://traffine.ru/123?utm_term=miroir+micro+projector+m20+activation+code In PDF document text
    • https://kisotupojez.weebly.com/uploads/1/3/4/4/134493444/bb16134.pdfIn PDF document text
    • https://fategebedabeno.weebly.com/uploads/1/3/4/7/134718848/sokurinom.pdfIn PDF document text
    • https://jumuwubugunitus.weebly.com/uploads/1/3/1/0/131070493/pululezadudin.pdfIn PDF document text
    • https://wizejuxexena.weebly.com/uploads/1/3/4/6/134655833/gakisetupej.pdfIn PDF document text
    • https://sofowalomutupal.weebly.com/uploads/1/3/4/3/134310420/23d5ae94f987.pdfIn PDF document text
    • https://zipexozinapewew.weebly.com/uploads/1/3/4/3/134339437/d54f3053260798.pdfIn PDF document text
    • https://vakinora.weebly.com/uploads/1/3/1/8/131857586/saberaroliruva.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nowokil/12622167854.pdfIn PDF document text
    • https://s3.amazonaws.com/fajonubinomeder/98109170256.pdfIn PDF document text
    • https://s3.amazonaws.com/duzexefemosaxe/organelos_celulares_unam.pdfIn PDF document text
    • https://s3.amazonaws.com/vifusupegiza/6007048043.pdfIn PDF document text
    • https://s3.amazonaws.com/jiguwuzobozobaz/share_call_option_agreement_template.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_off0000d3a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3A4 5424 bytes
SHA-256: 72fa4581c23dbd791c48c188ef050b647fc79df3d9577199ea876842d309628c
font_01_sfnt_off0000e618.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE618 10508 bytes
SHA-256: 60d18afea13a9166fffb63250652aa65cc73b867389018313bcaac9eb4f969d0

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