Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7165d654c7b0874…

MALICIOUS

PDF

103.4 KB Created: 2021-03-14 21:59:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 36afee09ecbabbae4f249ea5edad7407 SHA-1: cd94476ede7041cd0b591b06ed1e2353ae213d7a SHA-256: b7165d654c7b08743201acc4b9cde45835f32d381d5aa8a83d7351ee42de7143
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a technique often used for SEO poisoning or phishing. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. The embedded links, such as https://resalured.ru/123?utm_term=secondary+school+report+definition, are likely used to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

Heuristics 5

  • 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.
  • 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://resalured.ru/123?utm_term=secondary+school+report+definition PDF link annotation
    • https://radufogerexe.weebly.com/uploads/1/3/4/2/134265868/4476e47433.pdfIn PDF document text
    • http://lotibamuzuti.scienceontheweb.net/incantation_and_dance.pdfIn PDF document text
    • https://tugagofinose.weebly.com/uploads/1/3/0/8/130874012/1d0aa0.pdfIn PDF document text
    • http://bobujopolodusol.mygamesonline.org/46890324754.pdfIn PDF document text
    • https://tisogile.weebly.com/uploads/1/3/4/7/134728595/9068811.pdfIn PDF document text
    • http://mibemuxagegija.mywebcommunity.org/imax_b6_mini_firmware_1.15.pdfIn PDF document text
    • http://mitimewigupito.mypressonline.com/sigotopa.pdfIn PDF document text
    • http://zabolojisag.getenjoyment.net/sony_bdp-s570_remote_app.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/palevijuj/nebigoditi.pdfIn PDF document text
    • http://xumuritikoxuk.myartsonline.com/how_many_times_can_you_pump_a_crosman_760.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d358c23-1d00-4ca7-86e8-8478ffc17bfe/kofidap.pdfIn PDF document text
    • https://s3.amazonaws.com/dowesitobuga/why_tv_no_power.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cddb6275-448c-40ac-863f-4999f38cb900/does_google_know_my_location.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26ad2d3b-0176-43e7-9c97-5387cf0baa19/omron_hem-7120_automatic_blood_pressure_monitor.pdfIn PDF document text
    • http://telifujovemevo.atwebpages.com/rowumike.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30843531-b122-45fa-9692-cdb49189cb9a/lawizajetagunegexomafo.pdfIn PDF document text
    • https://s3.amazonaws.com/dozuga/corrugated_sheets_ltd_kenya.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/724b7658-9140-4f5a-af87-a3a5eb614380/what_streaming_service_makes_the_most_money.pdfIn PDF document text
    • https://s3.amazonaws.com/bufipevuril/46627716183.pdfIn PDF document text
    • https://s3.amazonaws.com/mulerux/the_miseducation_of_cameron_post_book_read_online.pdfIn PDF document text
    • https://s3.amazonaws.com/diwitapezu/kiplinger_retirement_report_state_taxes.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0D3 5632 bytes
SHA-256: 2f876996d7bbeb813855998035fb36b069bd337f222f52166a66607bc9c98c58
font_01_sfnt_off00010476.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10476 5448 bytes
SHA-256: 90b99eeafc109bc1ad51cceeda9439a1f70c34947703bfac32f0bbe365aa3559
font_02_sfnt_off00011700.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11700 3872 bytes
SHA-256: e28ff4ef929fab8ef1ec859ba0687cbd14170420281c18130a7533908160ecca
font_03_sfnt_off00012509.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12509 5292 bytes
SHA-256: 5d212e3a30916a06dbb4ca3d9af54dc8e9239ceb1af205920610a042c46e510b
font_04_sfnt_off00013657.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13657 14432 bytes
SHA-256: 7d71d1dd57ea444988f02ca68098a9b81ae299342e1d7c5645e94cf843f760e2
font_05_sfnt_off00016401.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16401 17212 bytes
SHA-256: 39dc3f22ff8bee3928399661cc10b6ca1c2f3ffa025df41b9053cf8a18dccda0
font_06_sfnt_off00017d14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17D14 4672 bytes
SHA-256: 705f54bb0dcf5f49b748ce222aa6de172710270c131eca4a222f76f918f1fd8b

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