Malicious PDF — malware analysis report

Static analysis result for SHA-256 2886c003adca20d8…

MALICIOUS

PDF

119.6 KB Created: 2021-01-10 18:02:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 273875460f42667a7cff452dd80c9575 SHA-1: d861d1697545c5dc6a22eb0b1fcd4b8081311991 SHA-256: 2886c003adca20d8ca9b6cd0b2fc0eb56cfe3324d7f148186fbb0e9c2076058a
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to what appears to be a link farm designed to manipulate search engine results or redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external URIs suggest an attempt to lead the user to compromised or malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafffi.ru/123?utm_term=dolphins+vs+ravens+2008+playoffs PDF link annotation
    • https://cdn.sqhk.co/muwazubivotu/hdMjchi/57876375528.pdfIn PDF document text
    • https://cdn.sqhk.co/zijikunu/gFWjd2Q/remix_shoes_lexington_ky.pdfIn PDF document text
    • https://cdn.sqhk.co/puvegipuros/6KRCfqn/picaportes_para_puertas_modernos.pdfIn PDF document text
    • https://site-1177405.mozfiles.com/files/1177405/download_stickman_fighting_battle_champion_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/lobitukojuro/qMgdAib/world_war_heroes_ww2_fps_hack_version.pdfIn PDF document text
    • https://morurotefat.weebly.com/uploads/1/3/4/3/134317018/7732665.pdfIn PDF document text
    • https://site-1166616.mozfiles.com/files/1166616/acoustic_electric_guitar_parts_names.pdfIn PDF document text
    • https://cdn.sqhk.co/zenetofuma/ihuiidG/adderall_effects_on_adhd.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/ragejufa/65893933008.pdfIn PDF document text
    • https://s3.amazonaws.com/jujojomojemiz/after_effects_free_software.pdfIn PDF document text
    • https://s3.amazonaws.com/pewibim/aikido_filosofia_y_practica.pdfIn PDF document text
    • https://s3.amazonaws.com/xeponodij/bpsc_ae_syllabus_in_english.pdfIn PDF document text
    • https://s3.amazonaws.com/juliziwojatige/95736416943.pdfIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/vorapo.pdfIn PDF document text
    • https://s3.amazonaws.com/pegek/borderline_personality_disorder_case_study_examples.pdfIn PDF document text
    • https://s3.amazonaws.com/tevigotu/arnold_j_toynbee_libros.pdfIn PDF document text
    • https://s3.amazonaws.com/widiku/86235984871.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_off00019549.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19549 5620 bytes
SHA-256: e47c8e41ffd34e0838a589e1e088fdf2634d245af87d58755a76e1c1169d03a9
font_01_sfnt_off0001a86e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A86E 12392 bytes
SHA-256: 23572b9043a7deaac5ea4333e1ed4ced4a749e30eec1f1fab384a0ea3142fce3

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