Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba63522ad10770db…

MALICIOUS

PDF

100.4 KB Created: 2021-04-23 22:54:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 1697157fe5876975dff4c37d557ce5e8 SHA-1: ee65039fefd378834a12119fa64fefd0daa0574c SHA-256: ba63522ad10770dbff39c2ec3fa382db0b961e4fd15731c77bfb7e5e13cb72ec
186 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, identified as a link farm, with a primary suspicious URL pointing to 'gimoguvi.ru'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or SEO abuse. While no scripts were directly extracted, the structure and URL patterns suggest an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 6

  • 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 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://gimoguvi.ru/strik?utm_term=why+was+magna+carta+important+brainly PDF link annotation
    • http://zobotalemogi.sportsontheweb.net/nazipaxituwosopufesebeti.pdfIn PDF document text
    • http://zuzavepojul.mygamesonline.org/wikewo.pdfIn PDF document text
    • http://masozaxo.22web.org/adjektivdeklination_deutsch.pdfIn PDF document text
    • http://subuxiwubemew.getenjoyment.net/wijegadugejetogun.pdfIn PDF document text
    • http://fruit-citrus.space/3ds_max_step_by_step_tutorials_for_bbhdfy.pdfIn PDF document text
    • http://xofazonir.iblogger.org/muwixekimuronasoviwepu.pdfIn PDF document text
    • http://laxogapajoze.getenjoyment.net/14877670307.pdfIn PDF document text
    • http://honbiz.pro/46567438656mu3zd.pdfIn PDF document text
    • http://litufunijefud.iblogger.org/cateterismo_vesical.pdfIn PDF document text
    • http://kdghy.online/marshall_dsl40c_amp_reviewz08u6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://b70645e9-42d7-44c6-80f2-f165c8819e8d.filesusr.com/ugd/3f1130_c408b61dcde047b198eea4f3a2b57b91.pdf?index=trueIn PDF document text
    • https://e0220c8c-c322-4c33-af83-7c5b0fe00b66.filesusr.com/ugd/a771bd_6d7dca3ded3b4fb684f6fbcbd1d561e8.pdf?index=trueIn PDF document text
    • https://181f3bdf-810f-4c34-abb3-9f3362228cd6.filesusr.com/ugd/30415f_0d01698f0ee5460399edff8a55af7b0c.pdf?index=trueIn PDF document text
    • http://dapizodipe.myartsonline.com/how_much_does_a_baby_grand_piano_cost_used.pdfIn PDF document text
    • https://3f740848-0e57-4b51-8596-564812021bec.filesusr.com/ugd/cbe17c_f604f8c2288340cdae0335bb9d6c6703.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/077206a3-678c-46c4-865a-6c4ec316740c/jafudar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90ac2377-8eff-4d0a-9425-4770252acd22/xupuvup.pdfIn PDF document text
    • https://c7fb3737-a2fb-4e06-b71d-f78b648bb0a4.filesusr.com/ugd/a9248e_599531bb3db74c04aa1abf356adedf71.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5dd14c90-26e0-4743-b89c-008c6db1a18f/advanced_dungeons_and_dragons_2nd_edition_espaol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b2816b6-d573-4d1f-af30-88628cdcc012/what_are_the_four_types_of_informative_speeches_discussed_in_this_chapter.pdfIn PDF document text
    • http://nepogewapiw.epizy.com/jodanerudotejubeb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e13b9496-fb58-4569-97cb-93e8cb402556/how_to_cite_words_from_a_song.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22b22ee5-1110-4e94-9953-f1f404a2e50a/how_to_mig_weld_correctly.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b12fc66a-a9a1-49bf-bad8-20b98d8b2d28/vadodabotusit.pdfIn PDF document text
    • http://xelepidozagetof.epizy.com/brahmastra_advanced_maths.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9b666a7-a865-46da-8fd9-0c53e1826d3b/babubetuwurugufek.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_off000110bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110BD 17744 bytes
SHA-256: 914fd5824ded112a4adb1b0765838742b69350d74bcbe311e5298734bf01a2de
font_01_sfnt_off00014996.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14996 5696 bytes
SHA-256: 8ebf12bf112fbd9e9e9e88eabed0d3b2fbf6a342e0567c83541c85503cda7b2e
font_02_sfnt_off00015cf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15CF1 11340 bytes
SHA-256: 12c941054e46b5d819bf0ee4db22d7629306af35809d561f708b7d1cd457ebc5