Malicious PDF — malware analysis report

Static analysis result for SHA-256 519f91e5ee2e7f3a…

MALICIOUS

PDF

85.3 KB Created: 2021-03-19 07:27:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3a64d6d2f5bbd9b01a56ad3b91c30db6 SHA-1: 571b957481c65217c9c6bf09a682a59328e2a674 SHA-256: 519f91e5ee2e7f3a7e4166288e42fe1c1b95792a23afff5a6bf5c306cc470323
104 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains embedded URLs, one of which is `https://jumiwimov.ru/123?utm_term=affairscloud+current+pdf+capsule`, suggesting a phishing or malware distribution attempt. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9919

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/123?utm_term=affairscloud+current+pdf+capsule
    • http://fesupopimos.66ghz.com/anganwadi_form_online_apply_2019_up.pdf
    • http://bnl-jobs.com/ledekalexigiwigapillxqx2.pdf
    • http://kupuzuzopojesu.22web.org/air_supply_songs_list.pdf
    • http://beach-fruit.fun/62291427036tw0gn.pdf
    • http://vovpomnim.ru/why_is_my_keurig_not_brewing_coffeek8ztc.pdf
    • http://xulikugo.iblogger.org/cibt_russian_visa_application_form.pdf
    • http://fukuzowi.sportsontheweb.net/as_bill_sees_it_free.pdf
    • http://mon-compte-cmb.best/30956743127abjvk.pdf
    • http://viniveba.mywebcommunity.org/free_download_mp3_ost_the_heirs_full_album.pdf
    • http://tebogekememesij.mygamesonline.org/belupidifejenidotid.pdf
    • http://centerverifybadge.com/85716819818hl683.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • http://beliraguw.onlinewebshop.net/povogusujexevalid.pdf
    • http://vumamuv.myartsonline.com/89977400339.pdf
    • http://sakizelezodumeb.rf.gd/novuwonekipoda.pdf
    • http://poserub.rf.gd/54533820861.pdf
    • https://s3.amazonaws.com/gotitibekovi/android_studio_installation_failed_with_message_null.pdf
    • https://s3.amazonaws.com/bofake/30578245097.pdf
    • https://s3.amazonaws.com/kovibu/isometric_dot_drawing_worksheets.pdf
    • https://uploads.strikinglycdn.com/files/3e98171c-2512-4653-abda-4749adbee382/infinite_money_glitch_gta_5_xbox_one.pdf
    • http://fevufubot.rf.gd/tutorial_sketchup_2016_bahasa_indonesia.pdf
    • https://uploads.strikinglycdn.com/files/5f771a45-43c7-4c32-8b4a-5c9edcce4584/how_do_i_register_my_house_with_the_post_office.pdf
    • https://s3.amazonaws.com/lewuli/appraisal_form_answers.pdf
    • http://guligovidafijew.rf.gd/python_learning_books_free.pdf
    • https://uploads.strikinglycdn.com/files/2ae0b5fd-2a09-4512-9686-9229aa2b58ba/clasificacin_de_funciones_algebraicas.pdf
    • http://lifanotuju.epizy.com/where_to_buy_pmbok_6th_edition.pdf
    • https://s3.amazonaws.com/bizamesuwepe/39680729168.pdf
    • http://sobibuxasegisun.rf.gd/how_to_make_sub_bookmark_in.pdf
    • http://desixomagi.epizy.com/how_to_tell_if_acne_is_healing.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNU
    • http://www.gnu.org/copyleft/gpl.htmRegular

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eabb.bin
79180be242a930cc78fcf7f875d93b603a931efa16a380f188dbc2de77168405
pdf-font-stream PDF embedded font (sfnt) at offset 0xEABB 5140 bytes
font_01_sfnt_off0000fc44.bin
b91f3c26f37c28538ed09035cbea6f9221827f1e30b50c452f08cc820bcc167b
pdf-font-stream PDF embedded font (sfnt) at offset 0xFC44 3720 bytes
font_02_sfnt_off000107a7.bin
e3e4427716781a8d54a593c873a316d9a61e451eb2f086b25fc4b6d5a2044662
pdf-font-stream PDF embedded font (sfnt) at offset 0x107A7 11008 bytes
font_03_sfnt_off00012d30.bin
8e752d966d723c9812687453b8224cca099ac90971fe62173f89f5de6940381c
pdf-font-stream PDF embedded font (sfnt) at offset 0x12D30 7552 bytes