Malicious PDF — malware analysis report

Static analysis result for SHA-256 abf2608f21378e2f…

MALICIOUS

PDF

76.0 KB Created: 2021-05-23 02:35:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c899731d5e1606877bb4a0e2d876fb15 SHA-1: b73d63670e2103da2aec27eaf229ff114724ec6d SHA-256: abf2608f21378e2f41fe9f0c2be149fd5b0ef74584a9dd78a3c00fb7e056b546
164 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://gimoguvi.ru/strik?utm_term=frozen+tamil+dubbed+full+movie+free+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4474752/normal_603aa92ce108a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413701/normal_604d6135bbfce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468286/normal_602a7d3271be1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409814/normal_601d327b9f42f.pdfIn PDF document text
    • https://rizedugo.weebly.com/uploads/1/3/1/4/131453818/vajulipibat.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409405/normal_5fc94e008cc59.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450732/normal_600d0e831b02f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426545/normal_5fd8c9b836ef4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413019/normal_600f0243378d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369163/normal_60172aad98712.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366340/normal_603d547685f55.pdfIn PDF document text
    • https://natozopito.weebly.com/uploads/1/3/4/1/134108601/feminuro.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454670/normal_5fe052f2d98ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470224/normal_5fdc459b8a155.pdfIn PDF document text
    • https://fujubonutebi.weebly.com/uploads/1/3/4/2/134266124/74f7ef197.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381094/normal_6029e32f2a806.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498324/normal_606c2b60a6b3b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499309/normal_5feff7ea3adab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446034/normal_60581e5d957ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388173/normal_605eebdb57f27.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380076/normal_602d9b999e19b.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/faxaxos/courier_address_format_in_india.pdfIn PDF document text
    • https://s3.amazonaws.com/rimejiguvif/tawolabegufitijuwi.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_off0000ece9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECE9 5172 bytes
SHA-256: 3d0d40200e08eb97cbe41ad700db2ecfb92615b0562c5af8f4cd9f00084e9f7e
font_01_sfnt_off0000fe88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE88 10528 bytes
SHA-256: a45b497ce08326b47b2f4ab8492081c9c30335e86475b8c0b0bd0115ce99f8eb

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