Malicious PDF — malware analysis report

Static analysis result for SHA-256 84fd4436a46bc77d…

MALICIOUS

PDF

78.4 KB Created: 2021-03-22 13:44:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: ffa9504e9ca53ed22ac578623c8a9303 SHA-1: 44485ae5038652129c3ee692456a1b91e4ba4811 SHA-256: 84fd4436a46bc77d5eb39f637c990b0fbba5c329162d4ec30ab736e2d6ef98a5
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 0.9992

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://jacksth.ru/award?keyword=antonyms+and+synonyms+list+a+to+z+pdf PDF link annotation
    • https://cdn.sqhk.co/kevovevude/djdoge5/kung_fu_hustle_trailer_download.pdfIn PDF document text
    • https://cdn.sqhk.co/toxinize/ozhZDid/62430780778.pdfIn PDF document text
    • https://lusanazuwade.weebly.com/uploads/1/3/4/0/134000197/laxamut.pdfIn PDF document text
    • https://kezeminitiwo.weebly.com/uploads/1/3/4/4/134476020/wanafux-xezuxokori-futidow-fofideriwej.pdfIn PDF document text
    • http://italonewsero.site/sodupakavivozcie1i.pdfIn PDF document text
    • http://cmbclientes.com/kaxajuzuvubokb2wel.pdfIn PDF document text
    • http://bimoriz.getenjoyment.net/15500998689.pdfIn PDF document text
    • https://cdn.sqhk.co/fobonelaga/jijcoha/16415323328.pdfIn PDF document text
    • https://cdn.sqhk.co/jaselavujuwi/foidZis/63760013750.pdfIn PDF document text
    • http://onenature.space/onesie_pajamas_for_adults_with_drop_seatww0vi.pdfIn PDF document text
    • https://pigamudabuv.weebly.com/uploads/1/3/4/2/134235231/37d9830f7c4.pdfIn PDF document text
    • http://instacopyrighthelpteam.com/kaduvxm6cv.pdfIn PDF document text
    • http://dilurijarejo.22web.org/dozifesobuvimugoditik.pdfIn PDF document text
    • https://rakuwogu.weebly.com/uploads/1/3/4/8/134858672/3344bb5f0cc.pdfIn PDF document text
    • http://manamuposa.getenjoyment.net/12396456529.pdfIn PDF document text
    • https://cdn.sqhk.co/kabawamurelo/9jehEhf/car_jump_start_kit_kmart.pdfIn PDF document text
    • http://xofofumireke.mypressonline.com/73892516936.pdfIn PDF document text
    • http://popisazono.getenjoyment.net/18502358309.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tekaxipi.epizy.com/balo_da_informtica_sumar_sumar_sp.pdfIn PDF document text
    • http://fonimegalidoxu.epizy.com/worksheet_for_cardinal_ordinal_numbers.pdfIn PDF document text
    • http://posazexemonepen.rf.gd/bachelor_of_information_technology_vs_computer_science.pdfIn PDF document text
    • http://mamisiz.rf.gd/cltd_exam_content_manual_free.pdfIn PDF document text
    • http://paserarun.rf.gd/alm_application_lifecycle_management.pdfIn PDF document text
    • http://vetuvadoxawiton.epizy.com/xakexasegazuguwefut.pdfIn PDF document text
    • http://xuxidiso.epizy.com/how_to_search_a_person_by_their_picture.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_off0000f343.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF343 5232 bytes
SHA-256: 39aad1ab8753d98694682282459cee2783ccddb591d98f981492e8eb818b16e1
font_01_sfnt_off00010517.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10517 11404 bytes
SHA-256: 68a4aac51849f95da2854bc61fea15909281fcff63476f97ff35e1e42746c7a9

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