Malicious PDF — malware analysis report

Static analysis result for SHA-256 df88cfb6f1e33a82…

MALICIOUS

PDF

71.8 KB Created: 2021-03-22 03:23:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 3077e03c93856ee852e0e7c961476d20 SHA-1: a884bf0d826bb47f4885cda9298a928e42e88548 SHA-256: df88cfb6f1e33a82eaa23620c3653d1821f18740b22f879c10fd0f86beeeff01
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous external URIs and embedded URLs, suggesting it acts as a link farm or a distribution point for further malicious content. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports the idea that the document is designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 5

  • 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 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://druttle.ru/wix?keyword=acid+base+equilibrium+worksheet+honors+chem PDF link annotation
    • http://akmurzina.com/what_are_the_advantages_and_disadvantages_of_report_writingjdhbn.pdfIn PDF document text
    • https://dujinagipufamod.weebly.com/uploads/1/3/4/5/134587046/2766382.pdfIn PDF document text
    • http://7lessons.site/multivariate_analysis_in_microbial_ecology4zjp7.pdfIn PDF document text
    • http://carinsusa.com/10069839607mvu5e.pdfIn PDF document text
    • http://mebelintera.ru/ffxiv_enemy_iconsusz8k.pdfIn PDF document text
    • https://pekafulif.weebly.com/uploads/1/3/1/4/131437409/7029711.pdfIn PDF document text
    • https://cdn.sqhk.co/jasurisunav/icBjihh/impossible_euro_train_simulator_free_download_for_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/lepavenujal/hehcghQ/ketivebulepaledemu.pdfIn PDF document text
    • https://cdn.sqhk.co/gebitasixa/TGrhcii/12492382111.pdfIn PDF document text
    • https://judirarizase.weebly.com/uploads/1/3/4/6/134645007/4bfb7a2fcae594.pdfIn PDF document text
    • http://tomuxajitibog.iblogger.org/figolajoxomojin.pdfIn PDF document text
    • http://xefopuro.mypressonline.com/xugegivanesu.pdfIn PDF document text
    • http://vufajed.getenjoyment.net/ballard_high_school_sports_schedule.pdfIn PDF document text
    • https://biwomewiwuxe.weebly.com/uploads/1/3/4/1/134131409/munoke-legotala-wetixow-kulurewe.pdfIn PDF document text
    • https://wawogikaso.weebly.com/uploads/1/3/4/7/134726687/xezirix.pdfIn PDF document text
    • http://indital.fun/moxaxogikitepokodofebaliwsuwr.pdfIn PDF document text
    • http://zuwifipenabed.medianewsonline.com/godebaponekitader.pdfIn PDF document text
    • http://zizodoroluxonaf.sportsontheweb.net/hp_officejet_6500_ink_type.pdfIn PDF document text
    • http://xegazinijitup.mywebcommunity.org/levetiracetam_davis_drug_guide.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mudotepejix.epizy.com/firth_of_thames_fishing_report_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/jamusobifudotakuzevut.pdfIn PDF document text
    • https://s3.amazonaws.com/susonanezaj/microsoft_powerpoint_business_card_template.pdfIn PDF document text
    • http://xizokokov.epizy.com/vapegane.pdfIn PDF document text
    • http://xonizud.epizy.com/creature_3d_all_hd_video_song.pdfIn PDF document text
    • https://s3.amazonaws.com/jivagajamav/gamoredamuxugokitimeleje.pdfIn PDF document text
    • http://sozuwalatoriwas.rf.gd/80526903752.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_off0000d9a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9A7 5592 bytes
SHA-256: b17bccc12c2e286cf6309173a8e398cb918d250d25cde7f26ea764dac9d784b9
font_01_sfnt_off0000ec8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC8B 10672 bytes
SHA-256: 15e1f1544e972c3996d9c091ea57899c8410ba9d86f5203b023b7a68d4806cc2

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