Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f678ebd9514810f…

MALICIOUS

PDF

84.0 KB Created: 2021-02-24 01:05:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 4ca1549ffdde71b5d7b3babfd45329cf SHA-1: bc8a2e83bbde392946e01b42bb02728c1ee8684f SHA-256: 2f678ebd9514810f68fa4cf3b7e08b844b71b2df603ff2c63c2301c1ccf9d2e7
236 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many of which point to other PDFs, indicating a link farm designed to manipulate search engine results or direct users to malicious content. The presence of a launch action and evasion techniques further suggests malicious intent, likely to redirect users to phishing sites or download further malware. The ClamAV detection and ML classifier output strongly support a malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Launch action high PDF_LAUNCH
    PDF contains a /Launch action with an unresolved or extension-less target — treat as potentially dangerous
  • Clickable PDF combines external action with parser-evasion structure high PDF_ACTION_PARSER_EVASION
    PDF has an external clickable URI together with object graph or xref structures that make parsers disagree, such as divergent duplicate objects, parser divergence, or xref offset mismatch. That combination is stronger than a plain link: the document is both an outward-action carrier and a parser-confusion/evasion sample.
  • 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://druttle.ru/wix?keyword=manual+kangertech+topbox+mini PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4482617/normal_5fe11715c04f9.pdfIn PDF document text
    • https://xadigepuve.weebly.com/uploads/1/3/1/4/131454317/xibinorifowavu.pdfIn PDF document text
    • https://suzoniku.weebly.com/uploads/1/3/4/4/134456843/f6156b2.pdfIn PDF document text
    • https://parafobosa.weebly.com/uploads/1/3/1/8/131857791/4643639.pdfIn PDF document text
    • https://fejaxipanegis.weebly.com/uploads/1/3/2/7/132712099/bowazakugu.pdfIn PDF document text
    • https://piminudoligot.weebly.com/uploads/1/3/4/6/134688392/3ff3b034c7de.pdfIn PDF document text
    • https://vopilexazum.weebly.com/uploads/1/3/2/7/132740267/e104f3ae2e60d7.pdfIn PDF document text
    • https://nexudusuje.weebly.com/uploads/1/3/0/7/130740550/5639295.pdfIn PDF document text
    • https://kufidadifijerid.weebly.com/uploads/1/3/1/4/131407945/52432e0b1f032c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459796/normal_5fca5e11419c7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368496/normal_5fde2d3e14f89.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475720/normal_5fdcc4f8640ed.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461511/normal_5fdff4c146c87.pdfIn PDF document text
    • https://cdn.sqhk.co/mapetidul/OeAsgcj/gudiforurukapezojimuxokuw.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/lijopavexanuse/17518757291.pdfIn PDF document text
    • https://s3.amazonaws.com/jamuluvuvava/brookfield_community_school_chesterfield_uniform.pdfIn PDF document text
    • https://s3.amazonaws.com/jubiferekaka/23435878004.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f648.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF648 5444 bytes
SHA-256: 6b211bb2a68ceadee9742a290a8d581de108bb94029c1ec9a66bef6fd3e60302
font_01_sfnt_off000108bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108BC 10528 bytes
SHA-256: 46879b12697b4a00d640ce8b3e75ea922b4c05f3db62ae1ccb723f3f15960ec9
font_02_sfnt_off00012cda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CDA 16296 bytes
SHA-256: 11ec05ed920b2d0fa5529e5771320d52f1a49fcd86446ba712997f8e074d6bd4

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