Malicious PDF — malware analysis report

Static analysis result for SHA-256 b63d4714171a5241…

MALICIOUS

PDF

80.1 KB Created: 2021-05-01 20:40:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 8a6407b7c810acb97237b241124ef1b0 SHA-1: 9db7fab57be93a0341ac87c6ccf3f4e84a3a14a9 SHA-256: b63d4714171a52413a5005d111861c7898a92ca517cf022979b3db667cb2f23d
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9998

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://jottigo.ru/strik?utm_term=redhead+sportsman+elite+30%2527%2527+digital+electric+smoker+by+masterbuilt+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4374963/normal_604e34aec05db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474191/normal_604d133516cd8.pdfIn PDF document text
    • https://cdn.sqhk.co/numokafas/ahdwoIc/jet_ski_racing_2019_water_boat_game_download.pdfIn PDF document text
    • https://cdn.sqhk.co/kajipazuto/jijhbyV/amazing_facts_about_mental_disorders.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482631/normal_604320e1207c8.pdfIn PDF document text
    • http://majedox.iblogger.org/49585231581.pdfIn PDF document text
    • http://lifolibi.sportsontheweb.net/ignou_assignment_cover_page_design.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/ba41eb49-948c-4e3b-a581-51bea421e04f/71650522754.pdfIn PDF document text
    • https://5862e4ea-63a6-4c92-af93-e06d02d1a664.filesusr.com/ugd/eaa371_a76fbc28538246bf85d3528f7d48514c.pdf?index=trueIn PDF document text
    • http://musizaxodolof.epizy.com/the_exorcist_series_cancelled.pdfIn PDF document text
    • http://xatugidu.epizy.com/ct_min_ph_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5953475-8b23-4986-a41c-27c2c43460b2/american_society_of_aesthetic_plastic_surgery_meeting_2019.pdfIn PDF document text
    • http://goxojerodumofag.epizy.com/xfinity_remote_codes_5_digit_tcl.pdfIn PDF document text
    • https://be1d055c-b83b-422e-9e68-1bf13cef350c.filesusr.com/ugd/5b1e3c_7859140a6bbc45af8d1f832431093feb.pdf?index=trueIn PDF document text
    • http://vafitinupisojud.onlinewebshop.net/zogunukivuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7be0eddc-acf9-4b63-9813-38bebb1cbdd0/51417883766.pdfIn PDF document text
    • https://ef9935f7-a918-44a1-999f-f1d50a45e4a7.filesusr.com/ugd/b463f2_b3bd0990d6be4d97ab5e309afdae73cf.pdf?index=trueIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECC8 6140 bytes
SHA-256: f621eda7af95f3f7b5114162a778fac33b32dc457a11c03507fc07c4ded64e04
font_01_sfnt_off00010189.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10189 1912 bytes
SHA-256: e9f8a3ef788f0cbd16162dfcacf3538d4d9f72d83e44e67f72eb93bd53224865
font_02_sfnt_off00010ab8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AB8 11188 bytes
SHA-256: a34567b8af01813fcf111e3ce4456d5369b3b64d6d14f888006defec298fd3dc

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