Malicious PDF — malware analysis report

Static analysis result for SHA-256 d20885a7105aa621…

MALICIOUS

PDF

76.8 KB Created: 2020-12-18 08:46:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: d9788aad9e85ce191f4bffd54f4a0ac0 SHA-1: 7c5b586830982149561e9876a724d92a988c766c SHA-256: d20885a7105aa621de8ff72ee08af6e1653168229649880d71cd5ca94e5b3cef
214 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with at least one pointing to known malicious redirector infrastructure. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' strongly indicate a malicious intent to redirect users to harmful sites. While no scripts were explicitly extracted, the nature of the link farm suggests it could be used to distribute further payloads or lead to phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffmen.ru/123?utm_term=roku+stick+parental+controls In PDF document text
    • https://mozejoli.weebly.com/uploads/1/3/4/8/134864480/lokodasad_rusir.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369310/normal_5f8f689b39fe2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380531/normal_5f913d3d4febf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc1393b40f1034a5caafdc7/t/5fd0cf8eef76c20f2d524314/1607520142335/dojakifimi.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe0b7d2dd96f5918b5901a/1606290301633/pennwood_condominium_association_inc.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc36642bd14ff0dd2ac8625/t/5fc72d3b5060c93fcd7881d4/1606888767024/fantasy_character_profile_creator.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf0522edfcd2bda9057f2/1606217811946/qubit_original_sample_concentration.pdfIn PDF document text
    • https://s3.amazonaws.com/xajowu/bamobare.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc78a4e02915d4a16f90a6f/t/5fcbc7a29708706f39a48a80/1607190442636/download_deck_heroes_legacy_mod_apk.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0c87788c99b6d37a67a80/t/5fc0eadb173fb5383bc33c3d/1606478581195/saleraxoxaxowuxabemiladu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe0f20eaf37e3b646345cf/1606291233601/9333869371.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0bebbcd1e280355d37542/t/5fc0e3ee9ee0f32b8773589b/1606476782726/psiphon_3_unblocked_at_school.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc7b0585426f52a30e09280/t/5fd02a87a040431536b50b8d/1607477896057/trump_news_today_fox.pdfIn PDF document text
    • https://s3.amazonaws.com/jewizopukuni/bloodborne_all_weapons_guide.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_off0000f167.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF167 4996 bytes
SHA-256: 6df18f7ec3e71a4c055ad8794a68bdfd81cdd8ee4e2818b327e33ef18e071e36
font_01_sfnt_off0001027e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1027E 10460 bytes
SHA-256: fc806190388aab61f886575ddf32b89672a3e022fb486cfbf724d975afa2ea46

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