Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8bafeeda64728d5…

MALICIOUS

PDF

81.0 KB Created: 2021-04-18 05:40:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 9148eb65d038fbdb4890d7331afbb772 SHA-1: a9e377be16567af5ef5d9986e0f0ecdaf8be110e SHA-256: a8bafeeda64728d52eea417697e0406fbc03dae4fdf79a1445c576376d1e0df0
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a significant number pointing to disposable domains and potentially malicious content, as indicated by the 'PDF_SEO_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristics. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though partially corrupted, contains a lure related to 'reading the Quran', which is likely a pretext to drive traffic to the linked sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ponafet.ru/strik?utm_term=read+quran+in+arabic+with+english+translation PDF link annotation
    • http://elinekici.online/nugunewisajkf4.pdfIn PDF document text
    • http://pay-order.info/what_is_considered_a_tangible_assetnl0sj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365661/normal_601c6a1bdceb8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484359/normal_606b62fd4fe16.pdfIn PDF document text
    • https://xowivana.weebly.com/uploads/1/3/0/8/130813667/ruvazuguneviko_gakeban_jifagomefotu_dokolunubekikuk.pdfIn PDF document text
    • https://gexaxiwiwa.weebly.com/uploads/1/3/4/4/134480231/furedoton.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476578/normal_5fd881a55a485.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503617/normal_6032dbb1b6dc4.pdfIn PDF document text
    • https://pawonojureva.weebly.com/uploads/1/3/4/5/134522231/mejezugi_kowodopakab_xibad_lejuwun.pdfIn PDF document text
    • http://copyright-securityx.com/acorde_a9_violoby97f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409992/normal_6020a985cc376.pdfIn PDF document text
    • http://gufutaca3.xyz/98093186541vajtg.pdfIn PDF document text
    • http://ita-bio.space/xifariviruslkws.pdfIn PDF document text
    • https://modefijibig.weebly.com/uploads/1/3/6/0/136011483/xodozarum_lipuwesizal_furumule.pdfIn PDF document text
    • https://rekaxarekarefov.weebly.com/uploads/1/3/5/3/135300852/5324327.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c580675e-8888-491d-8c80-3106eaac86fb.filesusr.com/ugd/c8a981_61499d1cb94344919def59ed89d5056a.pdf?index=trueIn PDF document text
    • https://712e085e-8422-4094-ae2e-709d430f1fc9.filesusr.com/ugd/bf8edb_00d6a7bfcc9d48f68a15de8ea2f710db.pdf?index=trueIn PDF document text
    • https://04a80c79-134c-446e-801b-0c1635678e59.filesusr.com/ugd/5cebf8_dee39126ece14d09ad63b1192358253a.pdf?index=trueIn PDF document text
    • https://30383b9b-b26a-44f4-9a26-03873af8f03c.filesusr.com/ugd/fdee49_da79b11e27524569aa601f849584d85d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fupanabivote/40331263457.pdfIn PDF document text
    • https://19f621d4-ab03-49b5-bf1d-c78de40104d4.filesusr.com/ugd/bc84a3_c477a37aa111479f93833c0babdf2645.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dudurat/50849610858.pdfIn PDF document text
    • https://s3.amazonaws.com/lekelepowo/pobudizosaga.pdfIn PDF document text
    • https://6376acfe-5884-4251-b3d5-19a03c044549.filesusr.com/ugd/de3d83_bead19f37cb64becb697584ffc2d0951.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/padadutiseni/zelda_ocarina_of_time_rom_n64_android.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_off0000fd70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD70 5564 bytes
SHA-256: b34ca575e986eb8fb7aabd63d1915b1813a3b6a07fc1d95aa8de65683c278615
font_01_sfnt_off00011061.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11061 11776 bytes
SHA-256: b353b7ed8115604cb24fb1923fa40101f34443fc3255665b33d04b1a69536c44