Malicious PDF — malware analysis report

Static analysis result for SHA-256 223e1744286ccd11…

MALICIOUS

PDF

43.9 KB Created: 2020-11-06 15:57:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 6ee3375315c8e6b0413f48c3bb6b2f9e SHA-1: d884d3d386ca75a0ecc38becc14c5f83b90b1054 SHA-256: 223e1744286ccd115ec6fd5060fb15034778ca19aa89c3fe659932ecd623ae77
116 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. It uses a QR-code lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://traffset.ru/123?keyword=ps3+remote+play+apk+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4408187/normal_5f95688227e46.pdfIn PDF document text
    • https://bajumavo.weebly.com/uploads/1/3/4/4/134486103/kanoxanu-lozile-buvewerologem-xubugibagevizim.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379038/normal_5f8a8bb87120e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/ukulele_canon_in_c.pdfIn PDF document text
    • https://s3.amazonaws.com/nuruvapozixix/the_hunger_games_ar_test_answers.pdfIn PDF document text
    • https://bifudavoz.files.wordpress.com/2020/11/1.pdfIn PDF document text
    • https://s3.amazonaws.com/wisatutadi/98167906629.pdfIn PDF document text
    • https://s3.amazonaws.com/dudurat/dudifedefezoda.pdfIn PDF document text
    • https://s3.amazonaws.com/juvuraguvutoxif/9600474890.pdfIn PDF document text
    • https://s3.amazonaws.com/rujimidujek/tixoruboriseka.pdfIn PDF document text
    • https://s3.amazonaws.com/midaguvimabof/unblocked_movies_77.pdfIn PDF document text
    • https://s3.amazonaws.com/jazuravazaguz/chittenden_humane_society_vt_cats.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005fec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FEC 5268 bytes
SHA-256: 03ea85cb8cc394f62ba86968ed41808e7dc1a6b73df54accc78687a482ccfd84
font_01_sfnt_off000071cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71CB 10280 bytes
SHA-256: 84a0ca2dc3589af8c3e3f3da8ebfd268ec238a0140d6103911a4e255e931dc88
font_02_sfnt_off000094f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94F7 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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