Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a5c302bef8bd183…

MALICIOUS

PDF

99.5 KB Created: 2021-03-24 17:03:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: a7fad6afb9bab795bf1532c1d2be81ce SHA-1: b404a681702e73cf84375bfd1f04cdba9a919d62 SHA-256: 9a5c302bef8bd1835f78ed07492df1ddfe49cce27fbf562ec7b0c131e3bcada5
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was flagged by multiple heuristics, including ML classification and ClamAV, indicating malicious intent. The presence of MFA and callback lures suggests a phishing or scamming operation. The document contains numerous external URIs, with several pointing to potentially malicious domains, likely intended to redirect the user to phishing pages or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://jumiwimov.ru/award?keyword=adoption+forms+pdf+texas PDF link annotation
    • https://cdn.sqhk.co/fexiseme/FIXgghg/chess_online_app_apk.pdfIn PDF document text
    • http://igoscandinavia.com/altered_carbon_season_1_trailer_hindi6tp46.pdfIn PDF document text
    • http://zilixijabukepul.iblogger.org/start_your_own_cleaning_business_ontario.pdfIn PDF document text
    • http://handler-autoscout24.com/what_is_a_word_for_feeling_happyui8mt.pdfIn PDF document text
    • http://zifasito.22web.org/modified_bessel_function.pdfIn PDF document text
    • http://detonic-italia.website/open_g_tuning_chords_for_guitar3cpmz.pdfIn PDF document text
    • http://delinapod.mypressonline.com/hp_elitedesk_800_g1_mt_desktop_pc_power_supply.pdfIn PDF document text
    • http://ruxuzosok.mywebcommunity.org/xegot.pdfIn PDF document text
    • http://rimka.xyz/blouse_front_neck_design_images_freeqbu6d.pdfIn PDF document text
    • https://cdn.sqhk.co/babakobesuxe/jegPhik/9878502496.pdfIn PDF document text
    • http://blancop.xyz/motorola_mh230r_rechargeable_two_way_radio_4_pack1p157.pdfIn PDF document text
    • http://trydouche.xyz/10207675010ybz0b.pdfIn PDF document text
    • http://iuts.space/6174026910470op2.pdfIn PDF document text
    • http://kizunawinim.getenjoyment.net/2008_jeep_wrangler_unlimited_x_axle_ratio.pdfIn PDF document text
    • http://wacc-cat.org/winchester_model_94_30_wcf_saddle_ringqanm4.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/vebenok/the_five_dysfunctions_of_a_team_summary_sparknotes.pdfIn PDF document text
    • http://gufopexolax.myartsonline.com/jarafugurijoxu.pdfIn PDF document text
    • http://nupuzawov.onlinewebshop.net/sijana.pdfIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/sijavetodekozidu.pdfIn PDF document text
    • http://virefixifefuke.epizy.com/thompson_crafting_and_executing_strategy_22e_test_bank.pdfIn PDF document text
    • http://lojupefiduk.epizy.com/xegorezazulagaxexipize.pdfIn PDF document text
    • https://s3.amazonaws.com/kujapomib/55935734796.pdfIn PDF document text
    • http://mupigedosawi.epizy.com/29031503048.pdfIn PDF document text
    • https://s3.amazonaws.com/wovitiku/que_es_tecnologia_informatica_y_comunicacion.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012fd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FD9 5212 bytes
SHA-256: 49e3f63c9cacd38e354514a81a8c020d85d9acab8c2eff656e5aafe13adf42de
font_01_sfnt_off00014187.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14187 12224 bytes
SHA-256: ede3b641b051e1dd12972696197a3d11dfda861dd6d6842e869d59763b1aa6db
font_02_sfnt_off00016b3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16B3E 16140 bytes
SHA-256: 1ffca1ef16be5e2ec436e77f9211a88ad3199dc781cb76600401cc2e2c7dce6d