Malicious PDF — malware analysis report

Static analysis result for SHA-256 894b45180f542c42…

MALICIOUS

PDF

86.9 KB Created: 2021-03-13 19:15:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 05732eaa377c6c4f1d4b66de4c2d0ad4 SHA-1: afcddbeab96b73d395791dbd7036c512f15232d3 SHA-256: 894b45180f542c42b5d800ea7f84096608e374c1b65531bd5b343f1fce0475b6
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 pointing to other PDF documents, indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or distributing further malware. While no scripts were directly extracted, the PDF structure and numerous external URLs are indicative of a malicious document designed to lure users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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/wix?keyword=shadow+hearts+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4371003/normal_600bf3e91d7da.pdfIn PDF document text
    • https://gegefajowib.weebly.com/uploads/1/3/1/3/131380265/wupusegafuwoze.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383340/normal_604b68707e807.pdfIn PDF document text
    • https://vebipebetas.weebly.com/uploads/1/3/4/0/134012388/somanokon_vawozuledosudo_pakufegevus.pdfIn PDF document text
    • https://sufifova.weebly.com/uploads/1/3/4/7/134736026/bfbf773e73.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411252/normal_5ff57f4ccd46b.pdfIn PDF document text
    • https://dawejiji.weebly.com/uploads/1/3/4/5/134505451/6321345.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403141/normal_601bb3fb3e8f4.pdfIn PDF document text
    • https://gonuvogizup.weebly.com/uploads/1/3/1/8/131857562/gafawovaximimizozan.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/a0faeb07-e4b3-4d58-a819-f1e339c58e2b/mubizudavufatug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12302c9b-2eb7-4520-b406-095a6841596b/kerakiwewibepisi.pdfIn PDF document text
    • http://vajowevub.epizy.com/98975444632.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/220d0d8c-af92-4950-acb4-b2a5435c24bf/how_to_train_for_football_on_your_own.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8744bfa0-bc02-446f-b667-57beb8b1cdfc/swisher_mowers_zero_turn.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/275507f9-d0b3-4ae9-90d3-56f9f4670ff6/m_audio_fast_track_ultra_driver_mac_high_sierra.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c07ceb8f-a049-404e-957e-a5ae6af2fa70/firesawidakide.pdfIn PDF document text
    • https://s3.amazonaws.com/jemisajoda/fojuvagasiwawap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a98de47-92da-4573-a112-defa59836d2a/72004812191.pdfIn PDF document text
    • http://sijomawawu.epizy.com/wizogizamutamixowuk.pdfIn PDF document text
    • http://wuguwusilabibax.epizy.com/rowodotaw.pdfIn PDF document text
    • http://dikanozep.epizy.com/7237443377.pdfIn PDF document text
    • http://puwevaladimeve.epizy.com/dapumaruji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8fc89496-7ac5-49c0-8a8d-07911a8b59d6/zesegamoviwokiketo.pdfIn PDF document text
    • https://s3.amazonaws.com/bupijila/browser_video_er_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7276550e-ece6-4263-b8ff-6efee55f1ef8/liftmaster_41d7675_error_codes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5814792-342c-469f-8192-2c8cca39e5e6/methods_of_language_teaching_download.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_off00010794.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10794 5024 bytes
SHA-256: a04f8cc737590f7026da163166375c61fc8c35afa3d896cd0038bd44fbac57ee
font_01_sfnt_off000118c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118C7 11580 bytes
SHA-256: bd226d8d3cf61641ad6442ea8431a5147bb4c82bec7824b59a7a59f799ef5367
font_02_sfnt_off00014023.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14023 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f