Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a7b209139026299…

MALICIOUS

PDF

96.6 KB Created: 2021-03-18 11:39:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 282f4d2f897759d4c1fdaf3c06d303fd SHA-1: 25cf061641103a78c2ef65017db6c0316be70ee5 SHA-256: 4a7b2091390262999dd0e211f45634761c9002127fb6b0eca5138716cc7cea1d
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 high likelihood of malicious intent. The document contains numerous embedded URLs, many pointing to disposable hosting, suggesting a phishing or malware distribution scheme. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically indicates the document's purpose is to act as a link farm, likely to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://gimoguvi.ru/aws?utm_term=the+power+of+positive+thinking+book+bangla+pdf PDF link annotation
    • http://vuvabadiredowa.getenjoyment.net/calligraphy_tutorial_free_download.pdfIn PDF document text
    • http://bexixibeguben.sportsontheweb.net/sebixusunudir.pdfIn PDF document text
    • http://vomenelavive.22web.org/cartesian_form_vector.pdfIn PDF document text
    • http://xibawipo.22web.org/19485918313.pdfIn PDF document text
    • http://dakejexisumupok.iblogger.org/46565708923.pdfIn PDF document text
    • http://narosisebono.22web.org/cherry_bomb_performance_ver._nct_127_lyrics.pdfIn PDF document text
    • http://axecheat7.xyz/hp_officejet_pro_8600_treiber_windows_8.1_downloadk2no5.pdfIn PDF document text
    • http://zizodoroluxonaf.sportsontheweb.net/fujitidimidubodin.pdfIn PDF document text
    • http://moradudipomibo.mypressonline.com/digestion_de_las_proteinas.pdfIn PDF document text
    • http://libralab.digital/83410789565x5juo.pdfIn PDF document text
    • http://wiwovurezibaso.getenjoyment.net/84464459845.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/522e5ddb-4c9d-40b1-ba73-d55104ea7329/45763663213.pdfIn PDF document text
    • http://medipebep.rf.gd/sony_strdh130_manual.pdfIn PDF document text
    • http://bobiwaj.rf.gd/lord_of_the_rings_and_the_hobbit_movie_set.pdfIn PDF document text
    • http://punexowimuseva.epizy.com/39526570709.pdfIn PDF document text
    • http://rivebop.epizy.com/knight_age_online_farming_guide.pdfIn PDF document text
    • http://lenofafezanobu.atwebpages.com/81447767980.pdfIn PDF document text
    • http://soranodabiwegi.myartsonline.com/17816846509.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/579e6fed-d70c-4bdf-aac9-7a8ded353abf/kotufevijebap.pdfIn PDF document text
    • http://fozilixugijuva.epizy.com/train_to_be_a_spiritual_life_coach.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC52 5608 bytes
SHA-256: 0ef16d3ce95409eb9f93ce04e6f80226b7624496a2184f9f426a5d7a07c37128
font_01_sfnt_off00010f6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F6F 23216 bytes
SHA-256: 7a7ecf94707b58ce8a9dc79873aea44b84ccbcf48851cd07c49939f300c94108
font_02_sfnt_off00014f40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F40 10136 bytes
SHA-256: f642dc40417907229361274dc6d1d67299ed7c45adbb6b42c26a4357e7ace64b

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