Malicious PDF — malware analysis report

Static analysis result for SHA-256 b45f2b5d55714900…

MALICIOUS

PDF

77.2 KB Created: 2021-05-16 01:48:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 50e7c2889e214cef518c9935190d3f27 SHA-1: 51d633dda0216d6f4167740d80f588fd48a91469 SHA-256: b45f2b5d5571490075e4888216e1b3f60ee57f9cde531898c3f0f8a832ae318c
96 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with a high risk score. It contains an embedded URI pointing to a suspicious URL, likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to a 'female led relationship survey', which is a common pretext for social engineering attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/strik?utm_term=female+led+relationship+survey
    • https://cdn.sqhk.co/xizemeginu/jW9jcgg/top_ten_songs_right_now_uk.pdf
    • https://cdn.sqhk.co/zivudasexoni/OHUhdbh/kowowanoxawopokopew.pdf
    • https://cdn.sqhk.co/woxemumi/ecj2xjf/stress_ball_price_in_pakistan.pdf
    • https://cdn.sqhk.co/datawafag/jjd84te/13645839240.pdf
    • https://cdn.sqhk.co/jesotipo/cQdZcie/1992_spiderman_venom_hologram_card.pdf
    • http://figimumagoko.mygamesonline.org/awol_guidelines_philippines.pdf
    • http://wijetaz.mypressonline.com/vegan_bodybuilding_meal_plan.pdf
    • http://devivitonewe.sportsontheweb.net/jejupek.pdf
    • http://dapajurop.mygamesonline.org/who_is_the_sexiest_man_2020.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://xigitada.rf.gd/72236649092.pdf
    • http://xanedemu.onlinewebshop.net/rifurogerun.pdf
    • http://biwosagamivi.myartsonline.com/anxiolytics_drugs.pdf
    • http://nazowovemozugiv.myartsonline.com/pdf_file_url_example.pdf
    • http://namezenidel.onlinewebshop.net/biological_nitrogen_fixation_mechanism.pdf
    • http://fegesizonavuvu.epizy.com/angry_birds_games_free_for_android.pdf
    • http://nudagimanefej.atwebpages.com/causes_of_lung_cancer.pdf
    • http://votofowum.epizy.com/arbroath_high_school_former_pupils.pdf
    • http://mubodadekutaxim.atwebpages.com/kaxoxejiximolumo.pdf
    • http://rokazit.epizy.com/lipavata.pdf
    • http://vugugemo.atwebpages.com/flowers_in_the_attic_lifetime_2019_cast.pdf
    • http://seroritubofa.atwebpages.com/lexunaxusudebexi.pdf
    • http://sedoguzod.rf.gd/singer_electric_sewing_machine_model_201-2.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_off0000f1ac.bin
bd307f6250ce5d34f539381487cd9f0fb6970562a0f4462b9ef8464f20908461		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1AC 5316 bytes
font_01_sfnt_off0001039d.bin
721250d32b33874603b6bb17de4f79d42a6c262fe791424d268435603dc25f60		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1039D 10512 bytes

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