Malicious PDF — malware analysis report

Static analysis result for SHA-256 0461eccc4be1d9cf…

MALICIOUS

PDF

80.0 KB Created: 2021-03-15 23:44:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: cb352027d83e6d26bc074e650410b399 SHA-1: 136eb70a393b14bb6f7f2ddf37e32cf45b0b0efd SHA-256: 0461eccc4be1d9cfe2d521d285be1147ec39155ebcc49612a105d16f362fa2ec
156 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 ClamAV and an ML classifier. 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 0.9991

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
  • 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://leonvi.ru/123?utm_term=a+thousand+years+piano+sheet+music+musescore PDF link annotation
    • https://cdn.sqhk.co/foradimotiri/huBKEjd/3dtuning_download_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/ragejeli/gg2njiT/countdown_to_knightfall_arkham_knight.pdfIn PDF document text
    • https://cdn.sqhk.co/turovonunido/btAjije/rei_s_minimap_mod_1._12_2.pdfIn PDF document text
    • https://cdn.sqhk.co/sovixojer/DBfjfjd/mobizen_mirroring_professional.pdfIn PDF document text
    • https://xazusajapefo.weebly.com/uploads/1/3/1/3/131383727/2333278.pdfIn PDF document text
    • https://cdn.sqhk.co/teposodigar/hggKFUX/99186356860.pdfIn PDF document text
    • https://cdn.sqhk.co/vojofarakiva/24khjjd/english_speaking_app_free_download_for_windows_7.pdfIn PDF document text
    • https://rogubadivuna.weebly.com/uploads/1/3/4/3/134337887/weleves_gisifixinakel.pdfIn PDF document text
    • https://cdn.sqhk.co/tabotewo/WYjhYap/fojore.pdfIn PDF document text
    • https://cdn.sqhk.co/vinogusi/TRcqjja/21806752241.pdfIn PDF document text
    • https://cdn.sqhk.co/xubulozirod/hjendhd/sopup.pdfIn PDF document text
    • https://ragixadimeruwu.weebly.com/uploads/1/3/4/8/134897014/f92f288be0ebda.pdfIn PDF document text
    • https://cdn.sqhk.co/sadirorig/HhxVhaG/dent_de_lait_in_english.pdfIn PDF document text
    • https://cdn.sqhk.co/potiribuwuf/dycUjcX/17622218999.pdfIn PDF document text
    • https://cdn.sqhk.co/putuziboki/vFphfjj/best_way_to_answer_your_biggest_weakness.pdfIn PDF document text
    • https://cdn.sqhk.co/givogaduta/eib3gjs/vikings_game_score_last_night.pdfIn PDF document text
    • https://denelabi.weebly.com/uploads/1/3/4/1/134109088/popawenanoxanude.pdfIn PDF document text
    • https://cdn.sqhk.co/giwumazusew/jfrbOih/define_antonyms_of_nostalgia.pdfIn PDF document text
    • https://cdn.sqhk.co/zovaratigu/yyjhjai/mixoxamafineli.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/55564248-4148-41d2-807e-d488b1430dcf/races_star_wars_the_old_republic.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a9148d2-a2ea-4114-8273-9d21aadfa407/siwafixenolidoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12a269c0-05c6-4c73-ab8a-ced5d4a7b0a4/nabupulufajibesewi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b0969df-22cc-4829-8390-71b1bc4a7b4d/bimegujiwavom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f2e0795-3350-456d-bb88-ac7e333babcf/how_do_you_remove_the_back_of_a_timex_watch_to_replace_the_battery.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_off0000f94c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF94C 5372 bytes
SHA-256: 11499367fea7100e9c920d3beb617c67f01f69d51a2fc9199c6a25fc7074021e
font_01_sfnt_off00010b71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B71 11256 bytes
SHA-256: 45fdec9ddb5a90389397ef8fede84fdad6af91b65806025f9060b2d03a81e26d

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