Malicious PDF — malware analysis report

Static analysis result for SHA-256 75f0f12383d79b49…

MALICIOUS

PDF

83.0 KB Created: 2021-05-31 23:08:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 5796c403c9b67115d05c45488118e7e0 SHA-1: 937316edd46c5270f13f246f32abf150259c56a7 SHA-256: 75f0f12383d79b49e98911d3a37ca23c461d28961a06f131324e99dc031291bd
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as phishing. While no scripts were directly extracted, the PDF structure and embedded URLs suggest an attempt to lead the user to a potentially harmful external resource.

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 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.
  • 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://queure.ru/pbw?utm_term=angular+custom+form+control+ngmodel PDF link annotation
    • https://wurilulisewanid.weebly.com/uploads/1/3/4/7/134728532/a3a668707c.pdfIn PDF document text
    • https://mabulibatelirip.weebly.com/uploads/1/3/4/5/134597637/42c0cbc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393188/normal_6011d1e444158.pdfIn PDF document text
    • https://wejatinolu.weebly.com/uploads/1/3/1/4/131438249/poxirizudozezok-runenaru-ruwifewimad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409258/normal_6011fb38a9f80.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494432/normal_5fd162244ad1a.pdfIn PDF document text
    • https://garokeresikiga.weebly.com/uploads/1/3/4/5/134584686/e8f04.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380076/normal_6041a8a0a69a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450635/normal_5fe8bd409f90d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427273/normal_601755110ee00.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452599/normal_5fd177e129712.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/c25d7c17-4fe7-4b65-873c-f36797f9e330/xavugobada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf6e11a8-4cba-462b-b03a-d75a5df9dc70/13663283433.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/304dc636-55d4-499e-803b-2f2949398e4d/jexeva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb7932a4-f3e6-43fa-9f47-76c97000edaa/how_to_test_mercury_poppet_valve.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8d0d11e-46e5-4bc7-a0f8-cbdc6e2badcd/51405569099.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cb34e2f-c759-42d4-860e-be7710cba60e/70202680801.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8144ff2b-ec78-4121-b794-48b1efb167e6/control_systems_engineering_by_nagrath_and_gopal_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c91c41d-9208-4831-a12b-a98795b81b4a/vox_ac15_c1x_blue_alnico.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4acd6df0-b979-40a2-8c75-19b02e1ec8c2/can_i_freeze_light_cream.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/221a64a6-bc79-456f-a41e-2a0fedb6dc74/why_when_i_touch_my_belly_button.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b8eb65e-a0ea-4afc-b910-9fb742e2b199/self_appraisal_answers_examples_healthcare.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e4406b1-bcfa-4850-b8e0-962b88157ffa/are_hondas_expensive_to_repair.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58c35207-a7e1-4f38-8f6e-bed0987d866d/is_there_a_recall_on_2016_ford_explorer.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_off0000f7e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7E8 5164 bytes
SHA-256: 7f34987bae740be4e8d1cd6ec1f0a11d0b112d3ee825f214556991554dc7a56b
font_01_sfnt_off00010957.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10957 11388 bytes
SHA-256: 107782b2fe6ae596838b3f56600322ce6ff838c223bbdad841a27d89819d3ab7
font_02_sfnt_off0001305c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1305C 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378