Malicious PDF — malware analysis report

Static analysis result for SHA-256 c038749905610cf6…

MALICIOUS

PDF

81.6 KB Created: 2021-03-06 22:50:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 82e7645fbbaedd56c00ab58de50ced64 SHA-1: 79aa02f927f7c3b8e4dfb54e1e5b7f700a15abaf SHA-256: c038749905610cf6e6c1ec71ac021901537c772f4b4ff32986f2d57634b6c035
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • 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 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=how+to+fix+a+jammed+wii+drive PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4481539/normal_60167e2883b5c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369499/normal_5ff1b08d00b52.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458394/normal_60120f2dc0eab.pdfIn PDF document text
    • https://manukigobedor.weebly.com/uploads/1/3/4/4/134481395/moditid_detekigogibad.pdfIn PDF document text
    • http://wapividazofar.scienceontheweb.net/80075261340.pdfIn PDF document text
    • http://ilkertr.shop/linda_tuhiwai_smith_decolonizing_met4pk8f.pdfIn PDF document text
    • https://puxibaso.weebly.com/uploads/1/3/0/9/130968956/7551433.pdfIn PDF document text
    • http://infokurs.design/rafipedanunasuhtoco.pdfIn PDF document text
    • http://mazers.fun/how_many_hobbit_and_lord_of_the_rings_movies_are_therenh9e6.pdfIn PDF document text
    • https://sajofagexureleb.weebly.com/uploads/1/3/4/6/134652103/wiruvinonukawiji.pdfIn PDF document text
    • http://xoziduso.mypressonline.com/4217304762.pdfIn PDF document text
    • http://myimperfectmomlife.com/celebrity_crew_wifi_logout9jmq4.pdfIn PDF document text
    • http://hydrofthol.space/fundamentals_of_bookkeeping_accounting7tpwq.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/4cceb275-cde2-4aac-bcbb-2de77cb90bf7/how_much_does_a_skyjack_3219_weight.pdfIn PDF document text
    • https://s3.amazonaws.com/gewisetug/keepvid_android_app_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9daf054c-fbe6-458a-826e-2a304388f2b5/10604693854.pdfIn PDF document text
    • http://zikoliduxa.atwebpages.com/warhammer_40k_audio_books_download_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3da5a891-6edc-4b10-b60e-ac3a8e1df882/zen_in_the_art_of_archery_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a8bbecc-6048-4163-8db5-7fdb2b189ac7/womewimux.pdfIn PDF document text
    • https://s3.amazonaws.com/kifutizijebuj/xiwesorafab.pdfIn PDF document text
    • https://s3.amazonaws.com/venunamazozuzo/vocabulary_workshop_level_d_unit_7_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/dukavunivifa/jabixupiwidogomulunukajox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c6e8850-460d-47eb-9a4b-341ab12238ce/saeco_xsmall_coffee_machine_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/penale/42324613734.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_off0000f63d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF63D 4784 bytes
SHA-256: 154ebdadefb14297fcca2f14d27e373e9ef2ea80ebf254b535e1eaafd997aa02
font_01_sfnt_off00010694.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10694 10632 bytes
SHA-256: d7beb989aaedf58c8ac5b9e75bf67b06f5796d16dc028fd4502a3538315e4359
font_02_sfnt_off00012ae9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AE9 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3