Malicious PDF — malware analysis report

Static analysis result for SHA-256 bead63efdefede33…

MALICIOUS

PDF

74.5 KB Created: 2021-06-11 04:00:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 50586b461f69dc145251d7413dd23191 SHA-1: 1a886dc7579dae12db81c1693abe6a15a39c3271 SHA-256: bead63efdefede3393e752d15c3510e452672ee4206c57fc79e6e1e27df9fe81
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ketchas.ru/pbw?utm_term=gta+vice+city+lite+by+android+king PDF link annotation
    • https://xakasevam.weebly.com/uploads/1/3/4/5/134509313/tibogedajebilo_ganunuzaxij_zunenidot_foviwivuwitas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416131/normal_60b872909acec.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493610/normal_5fc7a42d7f7eb.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4467274/normal_60b748992f6d1.pdfIn PDF document text
    • https://leludexubivavij.weebly.com/uploads/1/3/1/8/131860378/6126505.pdfIn PDF document text
    • https://vefubonipit.weebly.com/uploads/1/3/4/7/134719522/zopenonevu_tujutubumexa_jupasutotifo.pdfIn PDF document text
    • https://pexesalakodosok.weebly.com/uploads/1/3/4/6/134650812/lakok-wodimumuve.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377109/normal_604187ae898d4.pdfIn PDF document text
    • https://vomukefepa.weebly.com/uploads/1/3/1/8/131872153/295ecc.pdfIn PDF document text
    • https://pakujefaf.weebly.com/uploads/1/3/0/7/130740244/dotoxoxirilirunavo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dekokos.pbworks.com/f/naxezifudikupenozimujaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46c8bfe3-988a-4ede-95e3-20de5f11a28c/hoover_dual_power_pro_instruction_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48aea489-cdb5-4203-aa1b-6f176843d184/dapox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c6a4c25-a970-48e2-a2ce-f533da883e14/what_is_the_origin_of_the_roman_catholic_rosary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b589779c-8097-41c3-ac29-82d876984357/hambley_electrical_engineering_6th_edition_solutions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a25742cb-8e84-47bc-9015-b26efa44b4a5/petona.pdfIn PDF document text
    • http://puzavofan.pbworks.com/f/transitional_words_worksheet_sequencing_part_1_answer_key.pdfIn PDF document text
    • http://dijakezepo.pbworks.com/f/bevoz.pdfIn PDF document text
    • http://nosegawibaso.pbworks.com/f/xiwinuza.pdfIn PDF document text
    • http://tusoxefum.pbworks.com/w/file/fetch/144477288/49950367842.pdfIn PDF document text
    • http://pajinap.pbworks.com/w/file/fetch/144673308/variable_expressions_worksheet_answer_key.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_off0000e5f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5F4 5328 bytes
SHA-256: c98db15c9dd2ff71089ed60f4b899a25db2edb9d32a16fde3c61aaddccbcd158
font_01_sfnt_off0000f837.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF837 10616 bytes
SHA-256: 204f17a8c8c9044a610b5113c67b543396826adcdff095aa61600926878657ca