Malicious PDF — malware analysis report

Static analysis result for SHA-256 b49cdd12b15f9fdb…

MALICIOUS

PDF

70.5 KB Created: 2020-11-12 21:50:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 95701ba7785761cb1bd5efb9c5fe2f85 SHA-1: dfaae3fd961a833e86a3ce46f83837c8c1e81471 SHA-256: b49cdd12b15f9fdb8c93ba8979f3836077f596d94a9993b47c5b5bdf33230ea1
222 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious redirection and a link farm, suggesting an attempt to direct users to harmful content. The ML classifier and ClamAV detection strongly support its malicious nature. Although no scripts were explicitly extracted, the PDF structure and embedded links point towards a phishing or redirection attack, likely leveraging embedded JavaScript for malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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
  • 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://ggtraff.ru/aws?utm_term=brochure+design.+cdr+file In PDF document text
    • https://sefijawodu.weebly.com/uploads/1/3/4/7/134707847/efb96bbd.pdfIn PDF document text
    • https://temegefa.weebly.com/uploads/1/3/4/5/134583031/4494712.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367631/normal_5f875806367cb.pdfIn PDF document text
    • https://lewedizo.weebly.com/uploads/1/3/4/6/134610291/badaduzejijid_zenobumajori_sidorakawubav.pdfIn PDF document text
    • https://tunizedudozep.weebly.com/uploads/1/3/4/5/134589181/minibibasukesu.pdfIn PDF document text
    • https://sunuzokelegawo.weebly.com/uploads/1/3/4/4/134476032/labave.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417226/normal_5fa5aa857cdec.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/salosibejodod/energie_renouvelable_maroc_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/mamibis/romoroximakub.pdfIn PDF document text
    • https://s3.amazonaws.com/fokapikow/26487270554.pdfIn PDF document text
    • https://s3.amazonaws.com/kujapomib/18062403267.pdfIn PDF document text
    • https://s3.amazonaws.com/muxegeza/vovotojune.pdfIn PDF document text
    • https://s3.amazonaws.com/rebesudanolo/17387807638.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_off0000d793.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD793 5152 bytes
SHA-256: 4b1c3fd8534152cfe93be973da33e36ad99cfb5c4393698ccb5f775a120bb5a8
font_01_sfnt_off0000e91f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE91F 10652 bytes
SHA-256: 8dbe71df7e06c84b74b227e6700b943443a52b6e8671eb565f97b8303953c027

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