Malicious PDF — malware analysis report

Static analysis result for SHA-256 98035b1b37460b5c…

MALICIOUS

PDF

82.8 KB Created: 2021-01-24 03:06:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 43f982b3c3b77d9386de53b8a53caadb SHA-1: 5264aaec139518cc170679cff0bba4a411ef7d2e SHA-256: 98035b1b37460b5c1829c9968dc2d71986d3160426bd6adccb97fd74ad3eb3d8
126 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or malicious intent. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users to potentially harmful sites. The presence of external URIs and the 'link farm' heuristic strongly support a phishing attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://trafftec.ru/aws?utm_term=urbanisation+in+india+report PDF link annotation
    • https://cdn.sqhk.co/ninoporaleva/ZoZtCSF/46304585065.pdfIn PDF document text
    • https://site-1166621.mozfiles.com/files/1166621/best_drifting_games_pc_2019.pdfIn PDF document text
    • https://site-1172089.mozfiles.com/files/1172089/s__o__l_stone_of_life_ex_apk.pdfIn PDF document text
    • https://site-1178349.mozfiles.com/files/1178349/ribawa.pdfIn PDF document text
    • http://lozepamubi.iblogger.org/bacon_in_oven_on_sheet_pan.pdfIn PDF document text
    • https://site-1168172.mozfiles.com/files/1168172/british_superbike_championship_highlights_2019_brandshatch_round_12.pdfIn PDF document text
    • https://site-1180889.mozfiles.com/files/1180889/mipujikopifonememesubo.pdfIn PDF document text
    • https://site-1177369.mozfiles.com/files/1177369/chroma_key_video_editing_software.pdfIn PDF document text
    • https://site-1177496.mozfiles.com/files/1177496/paletta_smart_color_splash_pro_apk.pdfIn PDF document text
    • https://site-1262627.mozfiles.com/files/1262627/vba_date_time_now_format.pdfIn PDF document text
    • https://site-1254882.mozfiles.com/files/1254882/wrong_turn_5_movie_480p.pdfIn PDF document text
    • https://site-1171403.mozfiles.com/files/1171403/bricklink_wanted_list.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://joriboka.epizy.com/1378331935.pdfIn PDF document text
    • http://napubuxuwel.epizy.com/29198031542.pdfIn PDF document text
    • https://s3.amazonaws.com/feborobegibew/gotisokefuzefonojasiw.pdfIn PDF document text
    • https://s3.amazonaws.com/rijaliwiguvex/4313008246.pdfIn PDF document text
    • http://medelomozukomav.epizy.com/46088384900.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_off00010614.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10614 5052 bytes
SHA-256: c3723148f5cc763234d8165e0c635e5afb46b40ee8433e47780f54905a17f296
font_01_sfnt_off00011748.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11748 11352 bytes
SHA-256: 2ec544e00598fc2d310fb2963b03bc897afb038decceca3d352f1bca662ce82d

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