Malicious PDF — malware analysis report

Static analysis result for SHA-256 daa4a1f980c10205…

MALICIOUS

PDF

74.5 KB Created: 2021-04-04 01:06:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 397cc51c949af99066b708b9a3cce3c4 SHA-1: b0bc70a06d5e994315a684678430aceecc4934b4 SHA-256: daa4a1f980c1020577c09f7b519393829acb716a5925c255557fe11970f9a640
164 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 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 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://jacksth.ru/award?keyword=accounting+cycle+pdf+free+download PDF link annotation
    • https://cdn.sqhk.co/pajijolabalu/cQjeyky/47774974181.pdfIn PDF document text
    • http://ramosek.iblogger.org/bullous_pemphigoid_treatment_guidelines.pdfIn PDF document text
    • http://telgrm.site/5285823358450uy1.pdfIn PDF document text
    • http://surerup.22web.org/ammonium_oxalate_msds.pdfIn PDF document text
    • http://bu-markett.com/the_lego_star_wars_3_pc7ioi4.pdfIn PDF document text
    • http://detonic-italia.website/mibelomozuskhfh2.pdfIn PDF document text
    • https://cdn.sqhk.co/gusisitixinu/mLhbTyR/xozisawopexisod.pdfIn PDF document text
    • https://cdn.sqhk.co/putuziboki/jjjdxzd/90110549453.pdfIn PDF document text
    • https://cdn.sqhk.co/duponetix/icu2Wym/samsung_health_heart_rate_monitor_not_working.pdfIn PDF document text
    • https://cdn.sqhk.co/nurofiwele/ftWghKP/the_factory_communipaw_avenue_jersey_city_nj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nupotukig/18647819649.pdfIn PDF document text
    • https://s3.amazonaws.com/boxalewijim/xumabem.pdfIn PDF document text
    • http://savikolapuxol.rf.gd/96524609436.pdfIn PDF document text
    • https://s3.amazonaws.com/jidosatikim/duwoga.pdfIn PDF document text
    • https://e209d09f-5af8-48a0-acfc-72d03e9bea0d.filesusr.com/ugd/946fcc_a2c41ad7f38f4cb1ba7a33d3b334d94d.pdf?index=trueIn PDF document text
    • https://45ae50e1-98a8-4501-9ad6-fc0df438eb43.filesusr.com/ugd/b16523_1252a589b6de446dbd2273dae81aa5e0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nakevoja/kp_astrology_software_for_android_mobile.pdfIn PDF document text
    • https://s3.amazonaws.com/ninasivol/95379008660.pdfIn PDF document text
    • https://198d5876-2e36-4a54-a59d-b4c1060b65be.filesusr.com/ugd/4733ca_a17e24e62ef1490d8e36b7867a747d1a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sinadi/23544065708.pdfIn PDF document text
    • http://dijaxiletofevep.epizy.com/33830623457.pdfIn PDF document text
    • https://s3.amazonaws.com/ninasivol/cervical_screening_test_australia_patient_information.pdfIn PDF document text
    • https://s3.amazonaws.com/fifuto/pogil_lattice_energy_answers.pdfIn PDF document text
    • https://59548cc9-d6a6-4b2e-bd73-2bfb7290c7b5.filesusr.com/ugd/3fd21f_9b95199cded8441a9d293b83915caf48.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e376.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE376 5328 bytes
SHA-256: 454df7242f32cbdc0ececed2ec78221fe75a88127a7026ce739dc926827681c3
font_01_sfnt_off0000f5c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5C4 11488 bytes
SHA-256: f716022d5eb617926f3b2468444e42c313becff5872685a808101731e239149d

Open this report in the interactive analyzer, or submit your own file for analysis.