Malicious PDF — malware analysis report

Static analysis result for SHA-256 d59b6f308db38897…

MALICIOUS

PDF

74.6 KB Created: 2021-01-19 00:39:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: b431ed850213d323d86e5b1f5d6471dc SHA-1: 782ba62b3c8535a4cd5f5b64f3fbede077f1f84a SHA-256: d59b6f308db3889792264e81d87bbf7d4aee4bef4eb03ccdf79692a062f49601
214 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical finding for a link to known malicious redirector infrastructure and a PDF link farm. The presence of numerous embedded URLs, including one pointing to 'traffmen.ru', strongly suggests a phishing or malware distribution attempt. The ML classifier and ClamAV detection further corroborate the malicious nature of the file.

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=maid+sama+characters+green+hair In PDF document text
    • https://site-1218543.mozfiles.com/files/1218543/beyonce_formation_haters.pdfIn PDF document text
    • https://site-1175656.mozfiles.com/files/1175656/summit_trail_climber_at_275_65r18.pdfIn PDF document text
    • https://site-1241159.mozfiles.com/files/1241159/93410725677.pdfIn PDF document text
    • https://site-1166687.mozfiles.com/files/1166687/us_pacific_time_zone_map.pdfIn PDF document text
    • https://site-1172915.mozfiles.com/files/1172915/japanese_alphabet_song_tiktok_2020.pdfIn PDF document text
    • https://site-1174826.mozfiles.com/files/1174826/faxadidoxawo.pdfIn PDF document text
    • https://site-1177159.mozfiles.com/files/1177159/52153367277.pdfIn PDF document text
    • https://dunujamovexen.weebly.com/uploads/1/3/4/3/134361976/ganusudabezalaji.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/zufaxepixiguxax/calligraphy_alphabet_practice_sheets_printable.pdfIn PDF document text
    • https://s3.amazonaws.com/pajeriramal/golden_slumbers_sheet_music_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zetituri/manualidades_de_navidad_originales_y_faciles.pdfIn PDF document text
    • http://zetesapoxus.epizy.com/81828309989.pdfIn PDF document text
    • https://s3.amazonaws.com/godoremitiwuja/artificial_intelligence_books.pdfIn PDF document text
    • https://s3.amazonaws.com/rutufokedizon/cw_windows_7_activator_free.pdfIn PDF document text
    • https://s3.amazonaws.com/xiwevitox/soketuj.pdfIn PDF document text
    • https://s3.amazonaws.com/xakajoziwibi/android_tablet_2019_best.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_off0000e750.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE750 5328 bytes
SHA-256: 25efd8ff0a046fac53cd81d1cfb41576d9a0e2480765a1addd07012aaa5114bc
font_01_sfnt_off0000f94d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF94D 10628 bytes
SHA-256: a4b05b7c731c06833a96680dac6032e3145266511efd726b3f51f6f8a0a8d986

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