Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a17b209de0776f0…

MALICIOUS

PDF

76.6 KB Created: 2021-03-16 23:25:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 37852a46cc304adc299728dc58cdd585 SHA-1: 702051e4e15c3df282120c4f0395677c0aa2e066 SHA-256: 7a17b209de0776f0c7e73c843b75acfd54744f2512eaf153449ac60f8702344c
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 0.9991

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 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://jottigo.ru/123?utm_term=formal+letter+to+state+senator PDF link annotation
    • http://filozajerezabi.getenjoyment.net/labivefefukaxizimage.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495241/normal_602e22b42d662.pdfIn PDF document text
    • http://lufexaxoxak.mygamesonline.org/learning_spanish_worksheets.pdfIn PDF document text
    • http://muvezada.iblogger.org/why_is_my_salt_cell_not_working.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479707/normal_602147854ef29.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409826/normal_5fdba5dfd6d84.pdfIn PDF document text
    • http://todibojoposufu.iblogger.org/fulobopejifininifusoroled.pdfIn PDF document text
    • http://kojazunupetip.mygamesonline.org/73506310373.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374537/normal_60020eaabb2ea.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458145/normal_5ff97523c0bf4.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
    • http://visunes.myartsonline.com/para_que_sirve_la_moringa_te.pdfIn PDF document text
    • http://vigexosav.myartsonline.com/fipaseravobemabaruna.pdfIn PDF document text
    • http://tokavazeweg.epizy.com/capitolium_font_free.pdfIn PDF document text
    • http://mofemofosaxi.rf.gd/36913740936.pdfIn PDF document text
    • http://mirimanomuropa.rf.gd/sezuwiregolaka.pdfIn PDF document text
    • http://kifavudufolafu.epizy.com/duzotimad.pdfIn PDF document text
    • https://8c56b32b-3398-45d6-9c0b-b55146621f16.filesusr.com/ugd/6924eb_2088b1004b0547d397fc49f5a4550d63.pdf?index=trueIn PDF document text
    • http://dosekidonara.epizy.com/letter_before_action_template_unpaid_invoice_uk.pdfIn PDF document text
    • http://batapijas.myartsonline.com/durable_power_of_attorney_virginia.pdfIn PDF document text
    • https://cb0508fd-2a1f-4901-a161-a76823ee8e4f.filesusr.com/ugd/52013e_b9de994661df4055b8a8678622597a30.pdf?index=trueIn PDF document text
    • http://pimuxexud.epizy.com/wexugojuf.pdfIn PDF document text
    • http://jajogagek.atwebpages.com/sasesefo.pdfIn PDF document text
    • https://37bdae34-bb2f-403f-997c-54a7c09d9c06.filesusr.com/ugd/dc98cc_ef65d9db4c9a4e83af7bbf75b7ebeefa.pdf?index=trueIn 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_off0000e241.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE241 4528 bytes
SHA-256: b069653bd7edf086acd82b7ee9a37f29e5d214f8e945a5691b25429312439d26
font_01_sfnt_off0000f174.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF174 10988 bytes
SHA-256: b5a3ea95f6e97c09611a34fc07e4aa57044f72992565e76a0c57e37d86c6afcb
font_02_sfnt_off00011702.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11702 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f