Malicious PDF — malware analysis report

Static analysis result for SHA-256 84ee56b3009eec17…

MALICIOUS

PDF

69.7 KB Created: 2021-01-12 22:43:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 8b149c6110f17c1fc52a500907c393df SHA-1: d89cdd9d57aaf6190b1765c342b0b15f07513123 SHA-256: 84ee56b3009eec17ade77f0cf65281ee831df17a631247879684d3c83e808163
96 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for SEO spam or directing users to malicious sites. The heuristic 'PDF_SEO_LINK_FARM' specifically indicates a large number of external links, with one pointing to 'https://jewupoma.weebly.com/uploads/1/3/1/4/131437657/ae9e5.pdf'. While no scripts were explicitly extracted, the presence of embedded URLs and the ML classifier's high confidence score suggest malicious intent, likely to redirect users to phishing or malware distribution sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafftec.ru/123?utm_term=2000+buick+century+wiring+diagram PDF link annotation
    • https://jewupoma.weebly.com/uploads/1/3/1/4/131437657/ae9e5.pdfIn PDF document text
    • https://cdn.sqhk.co/sezunofubuzi/CFfhghj/47356246553.pdfIn PDF document text
    • https://mupibidegupek.weebly.com/uploads/1/3/0/8/130874042/kebivan_famafawu_xerirofegoz_bapijakaneju.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369777/normal_5fb4b57b306b4.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/fezenur/kabopijotajojin.pdfIn PDF document text
    • https://s3.amazonaws.com/tawovojo/learn_android_tutorials_point.pdfIn PDF document text
    • https://s3.amazonaws.com/takurugilij/fujupasilud.pdfIn PDF document text
    • https://s3.amazonaws.com/nafibanefexex/3882534597.pdfIn PDF document text
    • https://s3.amazonaws.com/saxefi/game_bomb_it_kart_racer.pdfIn PDF document text
    • https://s3.amazonaws.com/gogonof/46007742560.pdfIn PDF document text
    • https://s3.amazonaws.com/dusined/veritext_court_reporting_chicago.pdfIn PDF document text
    • https://s3.amazonaws.com/vobuturinivi/dekuxabijogogetug.pdfIn PDF document text
    • https://s3.amazonaws.com/rozebofukixus/tronical_tune_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/ximupuv/93747837859.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_off0000d30f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD30F 5624 bytes
SHA-256: 9d25864f784ab1ed80065ca4d935ccb5875678dafd838cb6868866a3c7381f23
font_01_sfnt_off0000e636.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE636 10372 bytes
SHA-256: 75482c885609413a951bf0e4c7f4d3500f205dd133e21d629618a9bc9ad35fb9