Malicious PDF — malware analysis report

Static analysis result for SHA-256 d30fe3c3443a9c8f…

MALICIOUS

PDF

42.9 KB Created: 2020-11-07 00:56:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 0249b0512a5ef137f79aa8df84da4532 SHA-1: dab61b76346266983d3d6a0892d8dfb6033f7079 SHA-256: d30fe3c3443a9c8fc3027e959e26f235e5a97b403726bff1936ab8ce94c53768
96 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. The ML classifier also flagged this PDF as malicious with high confidence. The embedded links, such as 'https://trafffe.ru/aws?keyword=fault+block+mountain+definition+earth+science', likely serve as a lure to redirect users to potentially malicious websites or for SEO manipulation purposes. No scripts were extracted, but the structure suggests a malicious document intended to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://trafffe.ru/aws?keyword=fault+block+mountain+definition+earth+science PDF link annotation
    • https://kogemujifogez.weebly.com/uploads/1/3/4/3/134344524/sodegowetutekokekuwa.pdfIn PDF document text
    • https://xifobosakup.weebly.com/uploads/1/3/2/8/132815359/kipifamoj-jedupesexava-tokatidalivo.pdfIn PDF document text
    • https://pakovabe.weebly.com/uploads/1/3/4/4/134442852/zutute-ralasigetinibuf-nofesadaz-nixitepanobinen.pdfIn PDF document text
    • https://vapaniwagivu.weebly.com/uploads/1/3/4/4/134442769/rusimaje-fazurexiz-kinixubu-vorizotejawo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369185/normal_5f93065d5f65b.pdfIn PDF document text
    • https://jiwepurojal.weebly.com/uploads/1/3/0/7/130775762/zogiridoxo.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/dogazisuze/can_adobe_acrobat_reader_dc_edit.pdfIn PDF document text
    • https://s3.amazonaws.com/mujevubutukoxu/mobijuwi.pdfIn PDF document text
    • https://s3.amazonaws.com/jutenojamega/keto_infinite_accel_pills_reviews.pdfIn PDF document text
    • https://s3.amazonaws.com/nitirew/latasib.pdfIn PDF document text
    • https://s3.amazonaws.com/napejaxosinages/ruvawasepugos.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_off00006632.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6632 5420 bytes
SHA-256: 04330d31349365aeb6d80a633e80697d1ee30ec24ccec4bfa434e3df9d46bf00
font_01_sfnt_off00007875.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7875 11564 bytes
SHA-256: e2ccdcee3e42b4bf7eae0b3660bba193e605def8432101ce9da6be7d826392b0