Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f8f6e98fc592688…

MALICIOUS

PDF

96.8 KB Created: 2021-06-11 00:09:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 5e1115534fc49190ebd2650efc9c2330 SHA-1: 09a2e65a8c51fc53707f86e39bd962fce45ae4e8 SHA-256: 6f8f6e98fc59268805652161472609dfd6a69d158a87504d84236ccc07cbd1c5
186 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics as a link farm, containing a significant number of external URIs pointing to various domains, many of which are hosted on disposable or suspicious platforms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were extracted, the structure and numerous external links suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://xajibur.ru/123?utm_term=bullet+bike+whatsapp+status+video PDF link annotation
    • https://pedumodab.weebly.com/uploads/1/3/1/6/131637036/cec5d9c08d.pdfIn PDF document text
    • https://seruliwosudaz.weebly.com/uploads/1/3/4/4/134457931/runopiziwujupij.pdfIn PDF document text
    • https://wuwilosuz.weebly.com/uploads/1/3/4/3/134394730/8526764.pdfIn PDF document text
    • https://remanajuzox.weebly.com/uploads/1/3/1/4/131437778/betenew_semataxagizedaw_bitavoweni_jufukeseb.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4383471/normal_60b2118f81853.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451227/normal_5ff6312fe6eac.pdfIn PDF document text
    • https://weluperexofabed.weebly.com/uploads/1/3/5/3/135382791/wunibufa.pdfIn PDF document text
    • https://nuniladolu.weebly.com/uploads/1/3/0/7/130775245/2041047.pdfIn PDF document text
    • https://pamokevavazodo.weebly.com/uploads/1/3/4/3/134386981/jagaxav_momip_ruwozafasewu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481285/normal_600a49f843718.pdfIn PDF document text
    • https://vesepuzimimewij.weebly.com/uploads/1/3/0/7/130776402/mulapinuxisi-fafenamivirus.pdfIn PDF document text
    • https://nevijajemiwawo.weebly.com/uploads/1/3/4/3/134340376/90ccb24.pdfIn PDF document text
    • https://rupasofo.weebly.com/uploads/1/3/4/8/134892789/xotixuwogupotenevuj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://xetuduju.pbworks.com/f/27236224397.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f723081c-878a-4dd4-ae28-ea428c5eba29/dinapajopowuxo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0631a2ed-5abc-4670-9da2-b9f318de1e50/do_androids_dream_of_electric_sheep_summary_chapter_5.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76c4bb04-94bb-4b32-aa75-fb871a0f34b1/collins_reverso_dictionary_spanish_english.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8f740d1-b524-4c84-9d3b-2fff78f8174a/5387353560.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ba72695-6e72-4caa-9609-f58e8e4bd2dd/95702755545.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/164ff910-3af7-4d98-a681-0f2cfcfbd642/divina_commedia_paradiso_sapegno.pdfIn PDF document text
    • http://gogogivu.pbworks.com/f/contemporary_abstract_algebra_9th_edition_solutions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcc08748-3485-431a-aa57-d848d7a279d5/sans_twenty_critical_security_controls_for_effective_cyber_defense.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1321fce-acb3-4028-ad4b-81ddfc706fce/how_do_i_know_my_child_iqama_status.pdfIn PDF document text
    • http://veposasidot.pbworks.com/f/25133925383.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010cf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CF8 5356 bytes
SHA-256: 7e42c417919915963f10295d496f672081c8e920f5302c3d80134aecfb799cd2
font_01_sfnt_off00011f38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F38 1800 bytes
SHA-256: daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e
font_02_sfnt_off000127c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127C6 10848 bytes
SHA-256: 12d866b9697d3633f5a5b196b9f6077251490be004837a700d040d9b4b6d0c10
font_03_sfnt_off00014d28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D28 13180 bytes
SHA-256: e724f0da65eaf97123eb65dbd01a024902690bde105eaf15453d6f25f589f1a9

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