Malicious PDF — malware analysis report

Static analysis result for SHA-256 313f370c5b2f2a43…

MALICIOUS

PDF

77.7 KB Created: 2021-03-28 21:44:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f8612735e63111c59a9924f06a6ed33e SHA-1: d2950f69aa6dc9c91ca7c99117e9bd417d64809b SHA-256: 313f370c5b2f2a43f763d4fc0f1b353a02a5f0f97a29fc8aae5f7cf270bc04cd
156 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics and a machine learning classifier as malicious, specifically for attempting to lure users into revealing recovery secrets or private keys. The document contains an embedded URI pointing to a suspicious domain, which likely serves as a lure or a redirect to a phishing page. Although no scripts were explicitly extracted, the nature of the lure and the embedded URI suggest a phishing attack, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://druttle.ru/strik?utm_term=etapas+del+proceso+de+investigacion+cientifica+en+educacion
    • https://cdn.sqhk.co/zolilobup/hdAajhb/shark_ion_robot_vacuum_r85_review.pdf
    • https://cdn.sqhk.co/zewesifadeka/dCL1CrP/best_new_york_tour_guide_book.pdf
    • https://cdn.sqhk.co/xolovagi/fggHZoK/2506411381.pdf
    • https://cdn.sqhk.co/matijamaj/j32geIz/niwunupafexudegiwixas.pdf
    • https://cdn.sqhk.co/fekimevexi/UhjfL5r/zapoforagenoge.pdf
    • https://cdn.sqhk.co/dusawugivepo/ehjhYuN/85474027704.pdf
    • https://cdn.sqhk.co/tibidimewako/bbijia2/my_cloud_wd_desktop_app.pdf
    • https://cdn.sqhk.co/jakovenuz/igjaDQz/lubonowapejofukefigoxapaw.pdf
    • https://cdn.sqhk.co/zivunegas/MgehKQG/forest_river_hd_pics.pdf
    • http://copyrightshelpcenter.com/how_to_call_forward_att_landlinefn5g8.pdf
    • https://cdn.sqhk.co/fimegasaz/3Wic7wD/14026529171.pdf
    • http://clubstore.info/jawopitikekemesinamejqjy9p.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/sitok/rikakirobarex.pdf
    • https://s3.amazonaws.com/mivokozibu/xogeponawudogipekedurafi.pdf
    • https://s3.amazonaws.com/ritoma/how_to_write_science_fiction_bob_shaw.pdf
    • https://s3.amazonaws.com/jozaponi/vokaxojenusufa.pdf
    • https://s3.amazonaws.com/dowavelaxam/30537781436.pdf
    • https://s3.amazonaws.com/fowonaxul/deshaan_skyshards_guide.pdf
    • https://s3.amazonaws.com/bizamesuwepe/52372160703.pdf
    • https://s3.amazonaws.com/nakuzafol/vunaxatumumegudajerubixu.pdf
    • https://s3.amazonaws.com/tarizirefevifab/silk_fitted_sheet_twin_xl.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f08c.bin
bd829a43b6bd2e49770cacbcee1b668df110720ecf0e2ff2307302a585e2c954		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF08C 5340 bytes
font_01_sfnt_off000102d2.bin
e7997c6eb5d2f240da7185d9286c05d2819c78e635633a18c62c3ee96783be60		 pdf-font-stream PDF embedded font (sfnt) at offset 0x102D2 11300 bytes

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