Malicious PDF — malware analysis report

Static analysis result for SHA-256 be6ea7efaed940fc…

MALICIOUS

PDF

90.7 KB Created: 2021-05-27 23:27:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 4dd9f30278c110cf758644699e4a28ef SHA-1: 3e91d166db1481716653f6e3a34dd028bc0b4106 SHA-256: be6ea7efaed940fc4241dacb3cd60a6233c5e2bcc88618673abe938caed01bb6
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a large number of external links, a common tactic for creating link farms to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent. The primary IOCs are the external URLs found within the document, which are likely used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://pelibifir.ru/strik?utm_term=plan+de+auditor%25C3%25ADa+definicion+pdf PDF link annotation
    • https://kukixagunobi.weebly.com/uploads/1/3/5/3/135325453/durufopefew.pdfIn PDF document text
    • https://degodowaserujes.weebly.com/uploads/1/3/4/4/134494515/xozeros_fivubivim.pdfIn PDF document text
    • https://katifakemu.weebly.com/uploads/1/3/1/3/131381151/javutivawipipi.pdfIn PDF document text
    • https://motaxajofepox.weebly.com/uploads/1/3/1/3/131381237/kunapu_dakepotumefetag.pdfIn PDF document text
    • https://jemajodelevo.weebly.com/uploads/1/3/4/3/134394711/puduzotivugogig-vivarozulijube-rapetogajeki-gigebag.pdfIn PDF document text
    • https://zarogamotelim.weebly.com/uploads/1/3/4/3/134344532/dusikeginir.pdfIn PDF document text
    • https://weworikifuga.weebly.com/uploads/1/3/4/5/134515792/vowijuruseveleja.pdfIn PDF document text
    • https://zefilezagomi.weebly.com/uploads/1/3/4/4/134474677/geniwajobamow.pdfIn PDF document text
    • https://zogiwabut.weebly.com/uploads/1/3/4/3/134364715/dukisatek.pdfIn PDF document text
    • https://matopudalerem.weebly.com/uploads/1/3/5/3/135318895/77c9f8b1ce7146.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/665f76f3-f092-48e4-a8c7-f3fac2e22d0e/27630396874.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65fdda64-48be-44aa-900c-9747e69365e9/nedikamobi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/624a071d-481e-48d1-8ed0-1ca35ca7290b/brother_ls-2125i_bobbin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f819ea54-b164-4240-b69e-e733b808f2db/47195156611.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e016730c-c4fd-4409-84ab-0ca49d1d73bc/how_to_add_symbols_in_fortnite_name.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9e6423b-ab8f-4083-b0cf-0a2fcda2044e/how_long_does_red_dye_stay_in_your_system.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea7a7e7d-8010-4398-a6ad-1240c7dca3ec/peavey_classic_30_reverb_fix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae4e662e-7659-44b1-81b8-5504a8287b41/newtons_third_law_lesson_plan_middle_school.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9345d55-cc0c-4094-ad0b-7a739924a7de/lomenotezuduxuva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/616ac278-ce88-4a88-b345-47960b48f648/nh_lut_bo_ton_ng_lng_lp_10_sgk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bdb9df7-65d2-40f1-bcd7-d9d8adc5baff/jijevasobipenixit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdf6d09f-7c23-4221-a147-4aa2af30b79c/48367522100.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccabf7f9-2fc4-4b9e-afc1-938845ebce00/kenmore_80_series_dryer_timer_not_working.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52db3474-f5bd-4267-abec-9b2260710ab7/how_do_you_facilitate_a_focus_group_discussion.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffc8059a-2514-4539-ad85-dca3e2143eb5/financial__managerial_accounting_for_decision_makers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb5aaea9-efd7-4ba9-abc7-4fe815aa8084/wematopapoleruvunuxuga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce07a164-8f20-4e5b-895b-c9b65354b0c6/77140742911.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0b220ad-771e-4619-b3cc-7fd02726bcfc/tomar_probioticos_en_embarazo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93bc45b7-749d-412f-8c48-8a2a441a329b/gotunoliseramorageligapoz.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010786.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10786 5028 bytes
SHA-256: 87e3e316e6ebcec302b66270077eae28b788822793d8b27bcbef3fe268318c2e
font_01_sfnt_off000118b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118B9 14496 bytes
SHA-256: e51d010671101567422466a6ae9da45dd7c1bcb488723fd1c885756cae1d33de
font_02_sfnt_off0001456b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1456B 16204 bytes
SHA-256: a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd

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