Malicious PDF — malware analysis report

Static analysis result for SHA-256 893a894d9370efdd…

MALICIOUS

PDF

72.8 KB Created: 2021-04-20 01:07:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b0183cee61f03cf4d134f870e5ef1e95 SHA-1: 16870f3dd33f3157eef0f04b3b38950d5ba8387a SHA-256: 893a894d9370efdda95ba6f53784b1a3c16b73d57a7f2aaa756b09c64f87c525
164 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical finding for a link farm and ML classification indicating maliciousness. The presence of embedded URLs and a 'download button' lure suggests an attempt to redirect users to malicious content. Although no scripts were explicitly extracted, the PDF structure and URL findings strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://kuzutuzo.ru/strik?utm_term=unique+rare+chromosome+disorder+support+group
    • https://cdn-cms.f-static.net/uploads/4423195/normal_601ac46db863b.pdf
    • https://cdn-cms.f-static.net/uploads/4474978/normal_600a18377f7ce.pdf
    • http://wufamega.scienceontheweb.net/converter_em_linhas_autocad.pdf
    • https://cdn-cms.f-static.net/uploads/4426957/normal_6050aaa771a95.pdf
    • https://mixusabap.weebly.com/uploads/1/3/4/0/134096097/xomuzogi.pdf
    • https://pimazapodozem.weebly.com/uploads/1/3/2/8/132814260/nipara_dijizu.pdf
    • https://gopaposoxawa.weebly.com/uploads/1/3/0/7/130740193/jasewirilijaxoru.pdf
    • http://bapadama.medianewsonline.com/livro_diagnostico_organizacional.pdf
    • https://vesetiwavulajed.weebly.com/uploads/1/3/1/3/131381055/xutotosonowuk.pdf
    • https://static.s123-cdn-static.com/uploads/4464077/normal_5fdda76966635.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/285dba92-f671-4475-a5c7-b16c2e4c2c40/25512367804.pdf
    • https://uploads.strikinglycdn.com/files/aed484be-2e44-43df-91a6-8e2669441794/kasupifosasafifipur.pdf
    • https://uploads.strikinglycdn.com/files/cf0b85d3-a582-4004-a853-640ace8ba9fe/is_cancun_safe_from_covid.pdf
    • https://uploads.strikinglycdn.com/files/8ca0afe1-1fc4-4d76-8cd2-88f8abd0898e/fanifudilo.pdf
    • https://uploads.strikinglycdn.com/files/ae618bd6-e995-4671-9458-e3a7990a31d8/wamomo.pdf
    • https://uploads.strikinglycdn.com/files/8fd99c66-c238-48e9-ab2d-e7da768e30dc/bukabuxonagetamij.pdf
    • https://uploads.strikinglycdn.com/files/17ca5efc-353d-4145-bfd0-3870e4ffc518/samsung_ce0168_battery.pdf
    • https://uploads.strikinglycdn.com/files/4e43ad00-8fde-4032-beef-eb60394919ab/54381245260.pdf
    • https://uploads.strikinglycdn.com/files/0e33a005-60d7-4dc1-9deb-35c78d672c3e/pixilowiwiri.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbeb.bin
82a65e64708610d49d5fa4eed26ac59f22c84bb1e941764b3058aa1938f4491a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDBEB 5572 bytes
font_01_sfnt_off0000eeaa.bin
c567db073a5a26a8edd693a15262d39d13f2bbedf29d64ccd85bbb50b94885ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEEAA 11484 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.