Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f36bfa6c3e4036a…

MALICIOUS

PDF

78.1 KB Created: 2021-03-05 08:01:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 9428d0ac0c7fa1b1b0f21f504ed4bc81 SHA-1: 17a38ee6b2ae5ca944c9eb521f974e86411c7caa SHA-256: 6f36bfa6c3e4036a88c8f3d2e6c346a3711a3119c95e9029aaebe7d02748c6c8
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high probability of malicious intent. It contains a significant number of external links, suggesting it functions as a link farm or phishing lure, directing users to potentially harmful websites like jottigo.ru. The presence of PDF_SEO_LINK_FARM and PDF_SEO_DISPOSABLE_LINK_FARM heuristics further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jottigo.ru/123?utm_term=genius+g750+not+working PDF link annotation
    • https://cdn.sqhk.co/mazonixun/Jjhiboq/45070381462.pdfIn PDF document text
    • https://ziduxaxeg.weebly.com/uploads/1/3/1/3/131380546/6856055.pdfIn PDF document text
    • https://tujowijide.weebly.com/uploads/1/3/0/9/130969571/5353501.pdfIn PDF document text
    • https://pegavuvusejeda.weebly.com/uploads/1/3/1/4/131483027/73fd80948cf660.pdfIn PDF document text
    • https://cdn.sqhk.co/wirujurumugi/hbhgnfS/33164723677.pdfIn PDF document text
    • https://zuxadozi.weebly.com/uploads/1/3/4/6/134662888/rupubikasatekan-niziruwuj-vikewazet-poguzatisadexil.pdfIn PDF document text
    • https://zakupiza.weebly.com/uploads/1/3/5/9/135960967/1085456.pdfIn PDF document text
    • https://fomimelagesuto.weebly.com/uploads/1/3/1/4/131406840/xesugadodivoxan-gakipowifewezo-lulipijudov-lubazifegijeg.pdfIn PDF document text
    • https://fovivijidilel.weebly.com/uploads/1/3/4/8/134888041/joxazavixo_pumuvukun_jeloxubexu_jisadogujesidu.pdfIn PDF document text
    • https://bazafegaxu.weebly.com/uploads/1/3/1/3/131383427/392aa5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://df9240ce-57b4-430e-a582-521170ca5232.filesusr.com/ugd/10b03a_2deb04f8dc454b5abd2da6012078c010.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fopalew/mystic_messenger_guide_deep_story_day_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2881d7c-e219-4de3-9abf-a37e6f11db7a/the_better_angels_of_our_nature_lincoln.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9c133fa-9eca-43f1-a018-d189b0b8b979/golds_gym_stride_trainer_350i_price.pdfIn PDF document text
    • https://1e8c0764-4a0f-46ab-84a2-5f63a8a44928.filesusr.com/ugd/6a0acf_ce4686afd355415c8fe037600917ff23.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ba44d2f-e83e-4d86-aa68-99572ed1514b/business_analyst_certification_courses_in_bangalore.pdfIn PDF document text
    • https://s3.amazonaws.com/dagasopones/10576987047.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7500025-514e-4f13-a42d-500150beda86/bulevijudewabalubepof.pdfIn PDF document text
    • https://s3.amazonaws.com/muxozuvalubi/data_sheet_display_7_segmentos_anodo_comum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73b4b2cc-89b6-415e-ab4b-c539014661ee/10705614564.pdfIn PDF document text
    • https://s3.amazonaws.com/podawakumepewez/getzlaf_injury_report.pdfIn PDF document text
    • https://s3.amazonaws.com/lomiwexuva/japan_guide_mount_hakone.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4FE 5144 bytes
SHA-256: 437e6660c8a437088007889d1bbcbdb93a930a9d3b59792c495af969c0927fe5
font_01_sfnt_off000106bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106BC 10752 bytes
SHA-256: 2aab0d5f557f842fe6b925b58c85840b1221a6d4d3de311a47ca6ea39ff92138