Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2ea104c49a10e12…

MALICIOUS

PDF

80.7 KB Created: 2021-01-11 17:45:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 2938b416565df6e2923aa1c3ad232fb7 SHA-1: 71bcddd7eb00e0d16a1bdd562335ab794aaa958d SHA-256: b2ea104c49a10e12a2fd72d7db06528dcbe8f202fbdf1f6483c73116df034953
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier with high confidence. It contains a large number of external links, many hosted on disposable domains, indicating it functions as a link farm. The primary purpose appears to be directing users to potentially malicious or phishing websites, as suggested by the URL structure and the heuristic findings.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://traffnew.ru/aws?utm_term=mikrokosmos+bartok+pdf PDF link annotation
    • https://site-1176264.mozfiles.com/files/1176264/lerogozijexoxotabinojuzu.pdfIn PDF document text
    • https://cdn.sqhk.co/gisanewat/QshjQib/smart_bracelet_your_health_tracker_manual.pdfIn PDF document text
    • https://site-1175555.mozfiles.com/files/1175555/classic_cars_for_sale_under_10000_australia.pdfIn PDF document text
    • https://cdn.sqhk.co/biziduwime/gjmicpM/11147737515.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371812/normal_5ff6ad5372516.pdfIn PDF document text
    • https://site-1168049.mozfiles.com/files/1168049/44688391980.pdfIn PDF document text
    • https://cdn.sqhk.co/jomububorava/bd7idjf/50943352834.pdfIn PDF document text
    • https://cdn.sqhk.co/mosugukasiba/3j17bXg/top_christian_hits_2019_youtube.pdfIn PDF document text
    • https://site-1185297.mozfiles.com/files/1185297/malayalam_children_s_film_song_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370777/normal_5fbb6918cb385.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427274/normal_5fac2b10c33b1.pdfIn PDF document text
    • https://jixatazibasuv.weebly.com/uploads/1/3/4/4/134402985/9668531.pdfIn PDF document text
    • https://cdn.sqhk.co/tejurorado/hafQdPf/pony_princess_academy_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/jasojime/zjblVqH/island_beach_state_park_tide_schedule.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4BD 5364 bytes
SHA-256: 865da0802da2db7ac14221803ce603c2c9375f05e04df2227ebef70a94593ee0
font_01_sfnt_off0000f6ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6EA 12628 bytes
SHA-256: a535d6e6507f6cf08d20ed75e8a5ddcb5bf68785727cd8133fe68e04249539dc
font_02_sfnt_off00011f32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F32 16184 bytes
SHA-256: c648c52aec952dde0462bb6c0a9eb0694104c16a23fe19116e26a7832e51cdb0

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