Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad1f6661df27e885…

MALICIOUS

PDF

90.2 KB Created: 2021-04-04 13:49:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: a17dc8c5bbb38738cd1866737b3899eb SHA-1: 572560266ca1c645143e75e7a4ff007682cf12e5 SHA-256: ad1f6661df27e88552dcf3d564793d1b6f59258a87983ed7e4dae859fd7ca98c
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external URLs point towards an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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=bahubali+the+beginning+300mb+movie PDF link annotation
    • http://goossyy.online/lapomiboseluwumidebefasanixej.pdfIn PDF document text
    • https://kixumiziri.weebly.com/uploads/1/3/2/6/132681985/tajugupolene_suwetuma.pdfIn PDF document text
    • https://ronabamipiboti.weebly.com/uploads/1/3/4/5/134598089/sabumixu_mifan_bunutifizanexiw_pafefulivodiw.pdfIn PDF document text
    • http://demask.space/sesivakuzidudizurisoxenutzkx76.pdfIn PDF document text
    • https://dexusejigisi.weebly.com/uploads/1/3/0/7/130739233/zezekobuxososutamelu.pdfIn PDF document text
    • http://xegazinijitup.mywebcommunity.org/grundig_s350dl_antenna.pdfIn PDF document text
    • http://hardcreditcheck.info/business_analytics_courses_online_free8q6a5.pdfIn PDF document text
    • http://creditpm.com/how_to_put_reusable_filter_in_keurig_mini_plus2xsy0.pdfIn PDF document text
    • http://prodson.space/8745649394ldt4t.pdfIn PDF document text
    • http://gojawufeki.getenjoyment.net/hp_officejet_pro_8620_ink_cartridges.pdfIn PDF document text
    • https://zuwukozoxuwiged.weebly.com/uploads/1/3/4/7/134713444/depiwudurasolo.pdfIn PDF document text
    • https://xegezutiraviral.weebly.com/uploads/1/3/0/7/130775125/vudeseziridekom.pdfIn PDF document text
    • http://xefopuro.mypressonline.com/xisezinudufibometugixak.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.orgThisIn PDF document text
    • http://www.fontrix.comhttp://www.nhncorp.comIn PDF document text
    • http://gudujezakolomu.onlinewebshop.net/zezumuzemejivaka.pdfIn PDF document text
    • http://mojiwajatej.rf.gd/convert_to_word_document_mac_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d685d715-79c8-4f5d-becd-d1c218b9c309/75938250862.pdfIn PDF document text
    • http://megegadimopef.rf.gd/wuxovigi.pdfIn PDF document text
    • https://68f06c25-eb64-4e0a-94e3-a0e33e610147.filesusr.com/ugd/463ace_7e3ce09b6af74a2f8e226354d95081c4.pdf?index=trueIn PDF document text
    • https://ced6af22-cf5f-4df0-9cd6-2d424634d287.filesusr.com/ugd/3eed2b_f5352cc863e543c3a20274c94811c78f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f94f9db9-1d38-4cb6-81c3-26abfa54492f/tippmann_a5_barrel_adapter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7365f1e0-adea-4787-a10d-edc8b0eb3af8/ganosezitajupot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3277232-8493-4729-a5b8-303b992a7468/fujamigemufevaro.pdfIn PDF document text
    • https://736f3f86-ac4a-4d06-be6b-3320275ea8ee.filesusr.com/ugd/cd27d0_baf728220f8149c8be63ca159002e623.pdf?index=trueIn PDF document text
    • https://2ddc7431-ff91-46e9-9708-195efd6cc195.filesusr.com/ugd/ffe0d3_455aa4849b894e9a8a8c98979b7bc7fe.pdf?index=trueIn 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://scripts.sil.org/In PDF document text
    • http://scripts.sil.org/OFLAbyssinicaIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB5C 5380 bytes
SHA-256: 1ee4307178bb8b1fb3ec90f313955bf92227055103ac39fe1a2e41c5f600a3f2
font_01_sfnt_off0000fd91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD91 20968 bytes
SHA-256: aa890c11d31957efca0fd402aa72a454fd9b4193136962196ca6c8da92cd1596
font_02_sfnt_off00011dc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DC0 2276 bytes
SHA-256: 04d00fe4d3d1cfb13f6c45ea00a1a16b92fe51d00c0709aca980b96f225372d0
font_03_sfnt_off0001278d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1278D 12004 bytes
SHA-256: 605bf620c1fca27110aa75bdc89cb90896a4628244a2a2e8e3dc5d85b49a0dfd
font_04_sfnt_off00014fd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14FD4 2056 bytes
SHA-256: 2e46b36fed23876ebb6e11f7a152916482bd8967c060a582f04975efc8a71266

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