Malicious PDF — malware analysis report

Static analysis result for SHA-256 03bd3e2907d61e2a…

MALICIOUS

PDF

116.3 KB Created: 2021-05-08 17:36:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 014c899b372d2ed4e269d087afedf961 SHA-1: 70242de869f157414980175ee22c4f293c4e3288 SHA-256: 03bd3e2907d61e2abe66d00e4d56ae14a7068e92e244ee7580cd1a324e2d235d
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable hosting services, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external URIs suggest it's designed to lead users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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.
  • 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://baarspo.ru/strik?utm_term=springboard+mathematics+course+1+unit+2+pdf PDF link annotation
    • https://cdn.sqhk.co/zexetiminav/jVXhgdG/america_s_funniest_home_videos_theme_song_2017.pdfIn PDF document text
    • http://iranianvc.com/ludanetujeviwikaguvebo1zbqf.pdfIn PDF document text
    • https://cdn.sqhk.co/sokaxopoje/KNDhjWd/guess_the_movie_quiz_answers_level_14.pdfIn PDF document text
    • https://fixogamirumi.weebly.com/uploads/1/3/4/7/134715439/3380959.pdfIn PDF document text
    • https://cdn.sqhk.co/butuxolevu/uJAnvii/mogagar.pdfIn PDF document text
    • https://cdn.sqhk.co/wirubetena/Egjwhi9/10183024198.pdfIn PDF document text
    • http://italdom.fun/62358991371pkl33.pdfIn PDF document text
    • http://civiliscmq.online/atmos_clock_repair_near_me4wblj.pdfIn PDF document text
    • http://labifovejes.mypressonline.com/doxatuzololaponepa.pdfIn PDF document text
    • https://cdn.sqhk.co/rekubapapup/jiaj5hi/zapupezusisisolugelelozoz.pdfIn PDF document text
    • http://tugrull.com/walgreens_automatic_arm_blood_pressure_monitor_instructions9brek.pdfIn PDF document text
    • http://lumacy.site/john_deere_z425_operators_manuald3l16.pdfIn PDF document text
    • http://fruitslope.online/civic_reset_maintenance_light72yab.pdfIn PDF document text
    • http://jabodaligononu.iblogger.org/gosapa.pdfIn PDF document text
    • http://gomijojupi.iblogger.org/chemistry_lab_hd_images.pdfIn PDF document text
    • http://nakanilo.club/58962001447936iz.pdfIn PDF document text
    • http://instapodarok.site/delirium_lauren_oliver_seriesss88q.pdfIn PDF document text
    • https://puzifisabu.weebly.com/uploads/1/3/1/3/131378936/66936.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fukasutatota.rf.gd/vuwukad.pdfIn PDF document text
    • http://varunogozanog.rf.gd/alcoholes_de_azucar.pdfIn PDF document text
    • http://gijodege.epizy.com/vizio_model_m50-c1_no_picture.pdfIn PDF document text
    • http://siniligavaxuvul.onlinewebshop.net/best_tarot_card_for_career.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_off000165db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x165DB 5964 bytes
SHA-256: a2614c28fa5b5501d2e4a4dc6f389f6b3a67f018291a7462c7a41189ef7cc1af
font_01_sfnt_off000179fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x179FB 2084 bytes
SHA-256: 97c711bb3d1324ff94dc280ed551adb6197a08bc6f21c131d02cbdaa793e0b56
font_02_sfnt_off0001830e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1830E 12288 bytes
SHA-256: 889eb54224b08475decae4908395be85ff04a326b75172b23ae0642133a82979
font_03_sfnt_off0001ad24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AD24 16292 bytes
SHA-256: 6ca0f0a73f519fca0c5a3a1347d11d0dbe71578f8d0ad9f4214e6797fd7774b5