Malicious PDF — malware analysis report

Static analysis result for SHA-256 329b48447670416d…

MALICIOUS

PDF

82.9 KB Created: 2021-03-23 10:51:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 1b03216281299ea05ab24d1d637a5875 SHA-1: 9dc647bd6bb40e20d288079800d3584cc473e97d SHA-256: 329b48447670416dcfae1b15c2f6203107da3968bc65325678c906f8546eaff1
226 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. It uses a password-protected-archive lure. 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 7

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://ponafet.ru/wix?keyword=norstar+phone+manual+m7310+change+time PDF link annotation
    • https://cdn.sqhk.co/dowepigakaw/f2TFjeu/xuzedogo.pdfIn PDF document text
    • https://wewebaviwipi.weebly.com/uploads/1/3/0/7/130775561/wopaloxanebofe-xarijivu-zufidadu-fimovirefarimar.pdfIn PDF document text
    • https://nafuxiba.weebly.com/uploads/1/3/4/0/134097784/musubodefotunawido.pdfIn PDF document text
    • https://cdn.sqhk.co/gefimiwotux/rgfYhEe/99540106531.pdfIn PDF document text
    • https://bikugepoxo.weebly.com/uploads/1/3/5/3/135351236/0059016b13d.pdfIn PDF document text
    • https://cdn.sqhk.co/ragejeli/hiSMChd/10661125741.pdfIn PDF document text
    • https://cdn.sqhk.co/majukedow/hjhgBGX/29208493436.pdfIn PDF document text
    • http://wozutujetotox.iblogger.org/baixar_app_store_android.pdfIn PDF document text
    • http://lorewipa.scienceontheweb.net/cva_wolf_209_magnum_break_action_.50.pdfIn PDF document text
    • http://pozijuza.scienceontheweb.net/81210244578.pdfIn PDF document text
    • http://sovumeriwox.mygamesonline.org/alcoholemia_definicion.pdfIn PDF document text
    • https://jobawanajofuru.weebly.com/uploads/1/3/4/0/134042661/bubefuziwij.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gevitejivojo.rf.gd/on_baby_girl_song.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1649ce38-f12d-4ebc-83d6-cdb844e0c151/fetax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14f24b16-6aa4-4e49-992a-1e0cf18d2bfc/77476298006.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4dfaf7f3-8a33-4f5c-9387-e22440fc7953/71641580752.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/898ef22b-bdc9-4aeb-9212-6e7a2a9dd1d9/how_to_remove_iron_on_stabilizer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a9a1f89-7719-4613-877b-6038d9194794/3m_safety_glasses_home_depot.pdfIn PDF document text
    • http://wawavaroxu.myartsonline.com/fedabiduzakumudis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80b16e09-b9ff-45a4-baf1-5a3652c2674d/5595725798.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/340e43d4-946d-47c4-8f7d-781d5ff3b2ec/tasejijanuvizoso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f46b79a-a0ed-4755-8c8c-87c5cf36c78e/66628071946.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9dd01c9-1635-4486-b7d9-a4ef3f78a06c/are_craftsman_torque_wrenches_any_good.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_off0001035c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1035C 5752 bytes
SHA-256: 40973f02be051e7f3a0af1a27710f8c3d50295fdc32e3c56bd414fa754e6a95d
font_01_sfnt_off000116d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116D8 11436 bytes
SHA-256: 672e7a6fef92dac8babd43644033c2714a5367933066776983a3b9e69a66790a