Malicious PDF — malware analysis report

Static analysis result for SHA-256 f27f12a3cfdc25b2…

MALICIOUS

PDF

89.8 KB Created: 2021-03-29 14:39:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: ae2f91658d920fa5de332753c99cfc2b SHA-1: 09bc34e5f8af5b1b0cf46d95bd74ec2c2937ccdd SHA-256: f27f12a3cfdc25b248ade57771ac2c584837a0ec26008317947db726aed3105d
156 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is a phishing document and a link farm, with one URL specifically mentioning 'download applock apk pro'. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing lure designed to trick users into downloading potentially malicious software.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9904

Heuristics 5

  • 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.
  • 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://zajinet.ru/wix?keyword=download+applock+apk+pro PDF link annotation
    • http://kifenefazujiz.iblogger.org/vejajag.pdfIn PDF document text
    • http://zisesir.22web.org/4_transistor_audio_amplifier_circuit.pdfIn PDF document text
    • http://logefekur.22web.org/what_does_picture_composition_meaning_in_english.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mowubuzedolilaf.epizy.com/78561434052.pdfIn PDF document text
    • https://5f90d536-2a72-4461-adff-280afd3056cb.filesusr.com/ugd/27c394_f4bd0f8a702544159cfd4eaa4d6993f3.pdf?index=trueIn PDF document text
    • http://wovitoted.epizy.com/rockstar_games_social_club_install_free.pdfIn PDF document text
    • http://gimukukuzape.epizy.com/mebizifiveporoxadezam.pdfIn PDF document text
    • https://s3.amazonaws.com/banula/dyson_dc35_battery_charger_no_light.pdfIn PDF document text
    • https://22449060-8e30-4723-8828-967625cce342.filesusr.com/ugd/eddc50_34eaa82c843c4f63907886274fabcc54.pdf?index=trueIn PDF document text
    • http://fudavifakafolid.rf.gd/nediwapebitele.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxuledo/instagram_videos_iphone_mymedia.pdfIn PDF document text
    • https://95a57b4d-a24c-4412-bd87-88f4f885d252.filesusr.com/ugd/011e4b_4059b749a5544368aac36fc74e129a46.pdf?index=trueIn PDF document text
    • http://xogegusubo.rf.gd/editable_invitation_template_ks1.pdfIn PDF document text
    • http://zovewopot.epizy.com/60792661609.pdfIn PDF document text
    • http://sezirinizisa.rf.gd/calculating_variance_and_standard_deviation.pdfIn PDF document text
    • https://aa4c2489-c93b-4667-afab-104bf5323bad.filesusr.com/ugd/8b49c6_1c1ff41ba5c947caaa3a5deb1fb29fdf.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dotivaf/bitijak.pdfIn PDF document text
    • https://s3.amazonaws.com/sejakopa/4_pics_1_word_level_133_answers_3_letters.pdfIn PDF document text
    • https://49b7c339-fea6-4bb3-bf7b-ca47af5263df.filesusr.com/ugd/6ca12d_1c41c8445768423a9db67dba0b0e0180.pdf?index=trueIn PDF document text
    • http://dukuzuwikisos.epizy.com/noaa_marine_weather_app_android.pdfIn PDF document text
    • https://s3.amazonaws.com/garorowa/dihybrid_cross_guinea_pig_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/mokixetat/99045140561.pdfIn PDF document text
    • https://s3.amazonaws.com/sitozi/wisoj.pdfIn PDF document text
    • http://xasiruzate.rf.gd/stock_audit_report_sample.pdfIn PDF document text
    • https://s3.amazonaws.com/wumodukubaru/leserut.pdfIn PDF document text
    • https://s3.amazonaws.com/dowavelaxam/fizikiwiwutenanarubow.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_off0000f5f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5F7 1768 bytes
SHA-256: df70ec2601ee0697c26f387ad329351f93a5e6a51f68b0fa69bf9f669926f24f
font_01_sfnt_off0000fe9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE9E 5044 bytes
SHA-256: 32bf1444bafce579ef82b5c974bc896e7d5377bd20279fc9cee1fb41ead30baf
font_02_sfnt_off00010ff3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FF3 19996 bytes
SHA-256: 0d061891140f020d87074069d552a3be257f1f373c6e8d7ee3d6a6f5b4456dbf
font_03_sfnt_off00014145.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14145 16308 bytes
SHA-256: 4fb969d3ea09ea5878645c4365acf38bddfb773d9b3df8d6ac2e66d1f9269766