Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c0ab94c0b4bcb18…

MALICIOUS

PDF

80.4 KB Created: 2021-04-12 16:17:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 8f699f63b30398951b31934e4db46619 SHA-1: 2336e31ff7092eef3422111fb0d240f9407577a4 SHA-256: 2c0ab94c0b4bcb18ae1eacdc45a5ecb7d1fa171ffd3cc9a56bc41e2edbab2118
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 hosting and employing UTM parameters, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded URIs are indicative of an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://xezojetit.ru/strik?utm_term=biblical+verses+on+the+incarnation PDF link annotation
    • http://rafupofamurawaf.mygamesonline.org/7563057283.pdfIn PDF document text
    • https://falatunasozenu.weebly.com/uploads/1/3/4/7/134762474/duxutital.pdfIn PDF document text
    • http://zevupixikug.mywebcommunity.org/catalytic_reforming_unit.pdfIn PDF document text
    • http://babusokojanog.sportsontheweb.net/furodudus.pdfIn PDF document text
    • http://xemokajoled.medianewsonline.com/96444336159.pdfIn PDF document text
    • http://zibodotuf.mygamesonline.org/catalogo_avon_campagna_14.pdfIn PDF document text
    • http://ruxuzosok.mywebcommunity.org/is_focusrite_scarlett_solo_good.pdfIn PDF document text
    • https://walazufa.weebly.com/uploads/1/3/1/3/131383665/a680e415d205.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://2e81f42f-67f9-46a9-89e2-a5f3ab3b03ee.filesusr.com/ugd/f138f5_54c163af0b8a49a3beda0313f62ecd65.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/26815c19-4dbc-4311-8403-53568fafa2b6/64396572926.pdfIn PDF document text
    • http://tirigofov.atwebpages.com/40817161139.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79f7c650-7457-49a5-abcc-3aef05d0b72c/storm_front_book_2.pdfIn PDF document text
    • https://413f70bc-0247-4a04-a3fc-eabb14e2b93f.filesusr.com/ugd/f18ee6_7a07fc05f7ac4d41a27c5e0c15fbdf6e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/85b5dcd9-d759-4634-be13-49ac3c1a8667/multivariate_linear_regression_analysis_excel_2016.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a855d59-cec3-48d0-927b-15b785b78bdf/what_are_the_4_main_elements_of_life.pdfIn PDF document text
    • http://luvabokinoleg.onlinewebshop.net/where_is_the_shear_pin_on_a_snowblower.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95bcff21-ac66-4f84-8e9d-4697b3805473/what_is_considered_a_good_gre_test_score_for_pa_school.pdfIn PDF document text
    • https://50037ee0-0691-4a53-bdc2-b2f8f795cfa6.filesusr.com/ugd/b41a9a_9a9d3bed90ba49eaa54ea700c995a725.pdf?index=trueIn PDF document text
    • https://777dd155-384c-4f1d-a337-8f27b94bb056.filesusr.com/ugd/1ecdae_7509bbe8ea1542728cfa2cc7db104e2a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c2e2282-e069-4805-be69-11d3cdfa546e/71004855578.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9710c30-12ab-44a0-b089-fa1b095ca5fa/brother_mfc-8950dw_treiber_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_off0000f0e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0E7 4924 bytes
SHA-256: 1ca17727acc2b16609fc85d60c78eecea1f7f32222c841f6cd0e9caf6f80a1ef
font_01_sfnt_off0001018d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1018D 10804 bytes
SHA-256: ba5e47129e96d7372b69967b2557d6cb4e77f6bd3ea8b4d62d9b4334d722fd90
font_02_sfnt_off00012638.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12638 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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