Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d3b617433e7d61f…

MALICIOUS

PDF

90.0 KB Created: 2021-01-18 06:47:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: bdbb73ecebc4f3fae41f879389b8001f SHA-1: c17c8a628e771d3ef85f268dbcee7865e675d84d SHA-256: 9d3b617433e7d61f7eee0062845a2442ce52fd6b0ed12a85935de344e20e115f
156 Risk Score

Malware Insights

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

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-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://traffking.ru/123?utm_term=shooting+an+elephant PDF link annotation
    • https://xotuwajugi.weebly.com/uploads/1/3/4/3/134349857/86a0d.pdfIn PDF document text
    • https://site-1166717.mozfiles.com/files/1166717/wufusofewego.pdfIn PDF document text
    • https://gojufoviwovefu.weebly.com/uploads/1/3/4/5/134515133/5310032.pdfIn PDF document text
    • https://site-1175531.mozfiles.com/files/1175531/hello_neighbor_toys_amazon.pdfIn PDF document text
    • https://cdn.sqhk.co/dutaxato/hdV0jhM/free_app_to_make_photo_collage_with_music.pdfIn PDF document text
    • https://memarexegota.weebly.com/uploads/1/3/4/3/134366516/nuxokeme.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390074/normal_5fc2b78fa4c06.pdfIn PDF document text
    • https://suzotavuni.weebly.com/uploads/1/3/4/7/134765747/fc089d.pdfIn PDF document text
    • https://pafuwaron.weebly.com/uploads/1/3/4/3/134385690/kibivirikix_nujujeponorono_sikavunejofuzo_zusubow.pdfIn PDF document text
    • https://cdn.sqhk.co/kizofapekeku/FjlFIjd/60033496174.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478141/normal_5fa6d24f84b1e.pdfIn PDF document text
    • https://menudobuwowewil.weebly.com/uploads/1/3/4/7/134765252/loman-gikage.pdfIn PDF document text
    • https://site-1218469.mozfiles.com/files/1218469/37385913605.pdfIn PDF document text
    • https://site-1250577.mozfiles.com/files/1250577/22234157295.pdfIn PDF document text
    • https://pobunusegem.weebly.com/uploads/1/3/4/4/134460984/matexogipi_tezajujav_gonilalur_sebume.pdfIn PDF document text
    • https://cdn.sqhk.co/desogepupema/U3qielq/89607882750.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://s3.amazonaws.com/nimuwet/pdf_bestanden_samenvoegen_adobe_reader_dc.pdfIn PDF document text
    • https://s3.amazonaws.com/mamukawaxatali/where_does_steam_workshop_mods.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/russia_friend_enemy_or_frenemy_worksheet_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/baxegezivumi/34446252979.pdfIn PDF document text
    • https://s3.amazonaws.com/mikibetiv/sakazofogavakuro.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000feae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEAE 4696 bytes
SHA-256: 877c27fcde78e6c6e38a13247de1e2a0fa0650cfef920adfaafd9adc0b2e54d4
font_01_sfnt_off00010e8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E8E 11136 bytes
SHA-256: d964cff45b72c0f82203e88b4bfd30feab45a3f5837c24d5a717a4e41d17b6f3
font_02_sfnt_off000134a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134A2 16408 bytes
SHA-256: 4fbc70ac3470c7b48739f19dbc35ecfc6488102b16d86e38825cf62664407868
font_03_sfnt_off00014a7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A7F 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176