Malicious PDF — malware analysis report

Static analysis result for SHA-256 03e05158b9359ac0…

MALICIOUS

PDF

65.7 KB Created: 2021-01-28 01:00:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 4fabbdf819bee03abc24848ed8f3a7aa SHA-1: 128e546a800fc7feca6fdd96a357a1fe0f5aa9c1 SHA-256: 03e05158b9359ac0a1cce6ee2e55763d0bc98b4c05d1bf0cd8815cf0b8395774
214 Risk Score

Malware Insights

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

The PDF contains multiple links to external websites, including a known malicious redirector. The heuristic firings indicate that this PDF is designed to link to a large number of external PDFs, likely for SEO manipulation or to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://yafferge.ru/aws?utm_term=free+laminated+snow+globe+template In PDF document text
    • https://jepigosewuva.weebly.com/uploads/1/3/2/3/132302921/8388295.pdfIn PDF document text
    • http://card2card-perevod24.site/nirosekek76z2t.pdfIn PDF document text
    • https://xaweregosakub.weebly.com/uploads/1/3/1/4/131407668/5655017.pdfIn PDF document text
    • http://qiwi-wallet.online/34168686446gfb5p.pdfIn PDF document text
    • https://feverawujebuv.weebly.com/uploads/1/3/5/3/135314909/3512612.pdfIn PDF document text
    • https://kilekofizinovi.weebly.com/uploads/1/3/3/9/133997912/zoguduni-zodativuwa-zibofuk.pdfIn PDF document text
    • http://natlab.ru/70515765340fi68v.pdfIn PDF document text
    • https://mokoluwi.weebly.com/uploads/1/3/4/5/134595511/bedogoregodo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406514/normal_6011ee13b4168.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/jiwotarotavuz/nazafamivuxuregazo.pdfIn PDF document text
    • https://s3.amazonaws.com/resisuna/54240387172.pdfIn PDF document text
    • https://s3.amazonaws.com/zinudipir/xfinity_wifi_windows.pdfIn PDF document text
    • https://s3.amazonaws.com/satudifin/tajinizoxi.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_off0000c3c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3C2 5468 bytes
SHA-256: 2aa1a796aa1537f70c4c1b4af5413dedfb6d31a3ca61a2de0690d109ea67569e
font_01_sfnt_off0000d64c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD64C 9992 bytes
SHA-256: 84e437661ce80aed5a3723dd00ede3b45117280c8af445636dca48bf081d48a3

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