Malicious PDF — malware analysis report

Static analysis result for SHA-256 d61d310441ece12e…

MALICIOUS

PDF

65.2 KB Created: 2020-12-17 07:49:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: a216dff7c7402fdd8310e8c65fe70d10 SHA-1: ebe3a200f7c987c8be3ad62f0586893812cb93fe SHA-256: d61d310441ece12e5775b9392459dc4a57da39883f409d882927b5508d098df4
154 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, with one identified as a known malicious redirector. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of numerous links suggests an attempt to lure users to malicious sites, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://ggtraff.ru/123?utm_term=sarah+cohen+md In PDF document text
    • https://suzixibaru.weebly.com/uploads/1/3/4/7/134709676/dotanovixukexeviz.pdfIn PDF document text
    • https://xofilovinavi.weebly.com/uploads/1/3/1/3/131379248/sotiketalomurat.pdfIn PDF document text
    • https://woremudof.weebly.com/uploads/1/3/4/7/134701645/19eaf.pdfIn PDF document text
    • https://kavovukabej.weebly.com/uploads/1/3/4/6/134621515/da82039.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc10f0fab79f442f22a8155/t/5fc274b5cb3e0f57719f6150/1606579382608/96448174059.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe73e73c6ccf69f3319e42/1606317032325/pesevutejusegalonixilo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4d45a97599144eedbb2a/1606372682009/zalewexog.pdfIn PDF document text
    • https://s3.amazonaws.com/zedilegol/92965770675.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5936eaffbf90a660a4a03/t/5fc6888e3485235c86aa7a65/1606846606752/9656249740.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe0dd2173fb5383b6961dd/1606290898884/bosidamutirisizujunajuva.pdfIn PDF document text
    • https://s3.amazonaws.com/kubafezin/html5_bootstrap_table_template.pdfIn PDF document text
    • https://s3.amazonaws.com/jajuzasalikirut/50991331980.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcef3dd65288022f4f608bb/t/5fd0d6803bcf75077a8c3e83/1607521920685/49120010481.pdfIn PDF document text
    • https://s3.amazonaws.com/tezofuretejom/how_to_negotiate_best_mortgage_rate.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_off0000c334.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC334 5072 bytes
SHA-256: b295ad629cc3c568471e8e00da811f6ca7c746edf7f472cc1baaf1a3bdc0216f
font_01_sfnt_off0000d446.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD446 10456 bytes
SHA-256: 524214619b1247fea815e6095d15329ab874c9e11d3bb2d1e4d24221fbb19d86

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