Malicious PDF — malware analysis report

Static analysis result for SHA-256 72ab2931353de354…

MALICIOUS

PDF

79.0 KB Created: 2021-06-14 13:00:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d7fcabfd622d901a4de7bc7e4dc39bb6 SHA-1: afb9202d24824cb339d016beceac0a110144a223 SHA-256: 72ab2931353de354f314b78e9afe8e676aaf308c1de726b9e741d86594acc593
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 0.9990

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://coretry.ru/pbw?utm_term=crunch+fitness+job+application+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4493227/normal_5ff5434d1bd6e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411709/normal_5ff5cde2b339c.pdfIn PDF document text
    • https://karifizamazo.weebly.com/uploads/1/3/1/3/131383674/385181.pdfIn PDF document text
    • https://rubasabavajexo.weebly.com/uploads/1/3/6/0/136028040/2fbc1c722c409.pdfIn PDF document text
    • https://kazajibabagak.weebly.com/uploads/1/3/4/4/134467412/4846915.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475864/normal_5fe832c6e7feb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402289/normal_60ba3b6ad903d.pdfIn PDF document text
    • https://sojizekupiguj.weebly.com/uploads/1/3/4/5/134586608/c50f32d41.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479445/normal_60184de92f132.pdfIn PDF document text
    • https://kowirakixodoxe.weebly.com/uploads/1/3/4/4/134467502/didezezag_dodotegetaverub_tufarorajomo.pdfIn PDF document text
    • https://jetireduru.weebly.com/uploads/1/3/1/4/131453335/167770.pdfIn PDF document text
    • https://bijariruxo.weebly.com/uploads/1/3/1/3/131382387/1e889cf.pdfIn PDF document text
    • https://sakedupepig.weebly.com/uploads/1/3/4/3/134355988/zugudelewizorez.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/65ba704c-d775-463c-9d7d-967d53335dde/51121899242.pdfIn PDF document text
    • http://mifudatu.pbworks.com/f/98923480575.pdfIn PDF document text
    • http://bokibagaror.pbworks.com/f/barilipu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d99167ce-052a-4abc-afb4-648c60a8e14e/24724683836.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1eb5b3f2-9a79-4892-8a3a-7600f5cfdb84/the_chronicles_of_narnia_the_silver_chair_movie_release_date_2019.pdfIn PDF document text
    • http://lomubel.pbworks.com/w/file/fetch/144573450/garetolidaxasusu.pdfIn PDF document text
    • http://medodadepud.pbworks.com/w/file/fetch/144645765/10660816815.pdfIn PDF document text
    • http://dewepun.pbworks.com/f/download_gta_4_pc_free_full_version_windows_10.pdfIn PDF document text
    • http://pokatufaxi.pbworks.com/f/what_did_jesus_say_to_mary.pdfIn PDF document text
    • http://finebov.pbworks.com/w/file/fetch/144647178/kgf_chapter_2_full_movie_in_hindi_download_filmyzilla_2021.pdfIn PDF document text
    • http://motekus.pbworks.com/f/guzezon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a1b73c5-6c38-4fbb-9fea-91bc8bffa9d5/how_to_tune_a_cobra_29_ltd_cb_radio.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_off0000f683.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF683 5364 bytes
SHA-256: 68da8fed927fce64c2dadabe8765df871eeb57593f65f4652a742251c7741a82
font_01_sfnt_off000108b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108B8 11076 bytes
SHA-256: 9094c85cb196f0ff1545b49a1ae0107ff229184ffc18ef84e3aec4424eeb9ccd