Malicious PDF — malware analysis report

Static analysis result for SHA-256 12efb4af504bade7…

MALICIOUS

PDF

79.5 KB Created: 2021-03-23 04:09:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 7821744948bb52680247b9b7469c0406 SHA-1: 217fb0faef610d66df70198db015ead06e082446 SHA-256: 12efb4af504bade760ac1d119ff5e536eb1276646063463ba271270442fdc6c5
126 Risk Score

Malware Insights

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

The sample is a PDF file detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs pointing to disposable domains, suggesting a link farm or phishing lure. The document body, though heavily obfuscated, contains references to 'Total war rome ii guide' and 'wkhtmltopdf', indicating a potential lure to attract users interested in gaming guides. The presence of multiple external URIs and a link farm heuristic strongly suggests the intent is to redirect users to malicious sites.

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://resalured.ru/123?utm_term=total+war+rome+ii+guide PDF link annotation
    • http://dasiwujupuna.sportsontheweb.net/tipuxofiwejowizixopugij.pdfIn PDF document text
    • http://mujododaziwato.scienceontheweb.net/plantar_fascia_anatomy.pdfIn PDF document text
    • http://topvideo.design/89170925855urt5t.pdfIn PDF document text
    • http://rewita.fun/massage_therapy_book2rthm.pdfIn PDF document text
    • http://gojavodevagajuw.mygamesonline.org/99_polaris_xplorer_400_4x4_specs.pdfIn PDF document text
    • https://cdn.sqhk.co/gitovera/iwytifp/19446339099.pdfIn PDF document text
    • https://cdn.sqhk.co/rijunawep/bxjejjI/streets_of_rage_1_playable_characters.pdfIn PDF document text
    • http://ladujose.sportsontheweb.net/dogivinajezu.pdfIn PDF document text
    • https://cdn.sqhk.co/sesekopusoj/hfhjQ0x/436_namahana_st.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/6975406a-0a2e-4d9e-9924-889951f4480a/91628990456.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d1b45d4-4e7f-4160-8dd2-fa3b45f36fcb/43364001949.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/089267e9-82dd-4f68-896d-62d97d5db142/motitavukedosova.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7386a5a2-edb0-45c7-8673-fbf73ad3cc27/wokevenubef.pdfIn PDF document text
    • http://kizitupavage.rf.gd/how_to_raise_your_self_esteem.pdfIn PDF document text
    • http://zisekajoreva.epizy.com/best_social_justice_topics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/323bbb75-846f-48b1-b0c6-058d251ae99e/management_information_systems_degree_course_outline.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8CF 4784 bytes
SHA-256: fce00cf4842e5bf70ed5e795b9ce6dcf17a7e232a3b302e7aa602ce30d23cc94
font_01_sfnt_off0000f923.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF923 12204 bytes
SHA-256: fe6467a6daffa4373c663f7ad5686df31e47b2133597f1a5ac3a004ae58009e2
font_02_sfnt_off000121a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121A2 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

Open this report in the interactive analyzer, or submit your own file for analysis.