Malicious PDF — malware analysis report

Static analysis result for SHA-256 867a5ed0ee98f7ee…

MALICIOUS

PDF

67.6 KB Created: 2020-12-21 18:36:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4cc6f6a40681c85eedb1102f53e8470b SHA-1: 42307be7b6fdfb4c2796d1a7bf9dec1a64891e49 SHA-256: 867a5ed0ee98f7ee7a07c1d3a81f205e898ce882ac02999f38128860b41ae8d0
214 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The heuristic firings confirm the presence of malicious redirector links and a link farm, suggesting an attempt to drive traffic to malicious sites. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious intent, likely to lead the user to a compromised or malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://gettraff.ru/strik?utm_term=wololo+age+of+empires+mp3
    • https://naweviwezufas.weebly.com/uploads/1/3/1/8/131856142/sazonude_gasufosabu_kibogoros.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/8a100964-e676-4a0d-b231-45731a086564/fiat_stilo_repair_manual.pdf
    • https://uploads.strikinglycdn.com/files/91b547d3-44fc-4603-9c91-0f2649442d0c/todapadobaduzemedud.pdf
    • https://s3.amazonaws.com/vexosafugunu/hashflare_calculator_spreadsheet.pdf
    • https://s3.amazonaws.com/lomuper/cavite_state_university_indang_application_form.pdf
    • https://s3.amazonaws.com/leguvefu/chatterbot_python.pdf
    • https://s3.amazonaws.com/fasanag/morkie_poodle_mix.pdf
    • https://s3.amazonaws.com/rovikibixu/diary_of_a_madman_1963.pdf
    • https://s3.amazonaws.com/luramamelolem/progressao_aritmetica.pdf
    • https://uploads.strikinglycdn.com/files/e625fc37-cf88-409c-9963-38424297386a/11911833695.pdf
    • https://s3.amazonaws.com/tomamujuf/vusapurejefubonusono.pdf
    • https://uploads.strikinglycdn.com/files/322ff411-131c-4f35-b56f-40f11103afa9/xogaritepatubopazipisa.pdf
    • https://s3.amazonaws.com/nitidadufetenu/3rd_gen_firebird_steering_wheel.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb55.bin
013afb2eeef27c7ef30c733a59bbee78ff1a72ca45c8d4206a1820de1073ff83		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCB55 5396 bytes
font_01_sfnt_off0000ddb6.bin
3491f41e8ef9e4cfd7d2b718aee7b0e19def9575da9713a2c280c5567690dfd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDDB6 10628 bytes

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