Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce12f94964cd4a8f…

MALICIOUS

PDF

79.0 KB Created: 2020-12-05 00:41:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: a2c269b751ab03e0e130e07ad0c064b2 SHA-1: f4cc31a5741ab4e133ed34175c6dbfb38564a980 SHA-256: ce12f94964cd4a8f8868ef894a5d61c4b0aca12a3645a2cda07caaa60a75c1bd
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, with a critical heuristic identifying it as a link farm. One of the primary external links points to a URL that appears to be part of a search engine optimization scheme. While no scripts were directly extracted, the PDF structure and the presence of numerous external links suggest an attempt to redirect users to potentially malicious or deceptive content, possibly for SEO manipulation or to host further stages of an attack.

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://traffset.ru/wb?keyword=best%20android%20graphic%20games%202019 PDF link annotation
    • https://lituveso.weebly.com/uploads/1/3/4/3/134362288/wajesakov_xeweg.pdfIn PDF document text
    • https://jaxedafotonomut.weebly.com/uploads/1/3/4/8/134885779/fidusebod_kobitimamuxidil_zowaxikol_vofunidobire.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379489/normal_5f8b551d71177.pdfIn PDF document text
    • https://pukaxixuzex.weebly.com/uploads/1/3/4/4/134492253/1000264.pdfIn PDF document text
    • https://vobijiwemifi.weebly.com/uploads/1/3/4/6/134673224/nazekivawi.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/kavalukato/roxetukubojuluj.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc11abd2bbd74065807b22d/t/5fc5bbbb3c6ccf69f325a6f5/1606794173070/japata.pdfIn PDF document text
    • https://s3.amazonaws.com/bisegilupuf/stream_we_re_the_millers_online_free.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d52e3dfdd95b60d4bb65/t/5fc82ce78eecd53e39e05354/1606954220382/epic_card_game_digital_kickstarter.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc013a70a2757459bde56bb/t/5fc1fbc63c02f22b9d537470/1606548425915/zafimopotemetesoxesukaxib.pdfIn PDF document text
    • https://s3.amazonaws.com/miwolezedubujoz/cribbage_rules_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/mokuwanibof/types_of_taxonomic_characters.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe1c01f81c9a2a0c6ad4f0/1606294529648/kitchen_witch.pdfIn PDF document text
    • https://s3.amazonaws.com/buwosevax/gifisonusajatojo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2c6472e34347c705053bb/t/5fc93b1f0351a25cf87ec347/1607023391529/vuwijelokulepoponuwolid.pdfIn PDF document text
    • https://s3.amazonaws.com/serogajugomiji/79346770828.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_off0000f6a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6A9 5984 bytes
SHA-256: 021264c77b51479eb60c0150128f8e243c8522ed67a10a9d04968488d89d42bc
font_01_sfnt_off00010ae5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AE5 10644 bytes
SHA-256: 54412e9028951eb0b4884434559e6da60c210e111a18a7caaeceb393801927c9

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