Malicious PDF — malware analysis report

Static analysis result for SHA-256 831e552302933e34…

MALICIOUS

PDF

74.3 KB Created: 2021-03-27 15:06:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 4db8cebd88a6dbafcdbc65a705729b09 SHA-1: ef1942f4d369a2647da7210739a00872b5faa881 SHA-256: 831e552302933e34b778f6af11ac0964a7bcfba553c3a9288ed096d5029aa952
96 Risk Score

Malware Insights

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

The file is a PDF document flagged as malicious by ML classifiers and ClamAV. It contains multiple embedded URLs, one of which is `https://zajinet.ru/123?utm_term=informatica+cloud+salesforce+connector+guide`, suggesting a phishing or malware distribution attempt. The document body is heavily obfuscated, but the presence of external URIs and the overall malicious verdict indicate a likely attempt to trick the user into navigating to a malicious site. No scripts were extracted, but the PDF structure itself likely facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://zajinet.ru/123?utm_term=informatica+cloud+salesforce+connector+guide PDF link annotation
    • https://cdn.sqhk.co/javomekoru/iggggia/nba_world_champions_ring.pdfIn PDF document text
    • http://socialwave.me/adopted_child_of_god_meaninged2zt.pdfIn PDF document text
    • http://reestr.site/motorola_sb6141_lights8x7lc.pdfIn PDF document text
    • https://cdn.sqhk.co/bozutebux/iihbkif/80581608560.pdfIn PDF document text
    • https://xawizavikerid.weebly.com/uploads/1/3/4/5/134525990/fetesegi.pdfIn PDF document text
    • http://indir-kazan.com/jerifiridobolojamece4c7.pdfIn PDF document text
    • https://cdn.sqhk.co/medujebukoma/iaXCgeS/disney_movie_trivia_quiz_and_answers.pdfIn PDF document text
    • http://goodsun.space/shark_navigator_vacuum_filters85p5a.pdfIn PDF document text
    • http://voicebftyi.com/bigopixupoforuwizqbyy.pdfIn PDF document text
    • https://nonafinawajag.weebly.com/uploads/1/3/4/3/134331790/6811073.pdfIn PDF document text
    • https://cdn.sqhk.co/vuwewiwudesi/ghjajic/spelling_test_paper_printable_free.pdfIn PDF document text
    • https://diwekapuxejube.weebly.com/uploads/1/3/1/4/131455019/zeduxozojagug-liwisubupale-xupajudeg.pdfIn PDF document text
    • http://jadogaxarabu.mygamesonline.org/colored_pencil_drawing_ideas_easy.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/divexikav/gazitakanusunuwog.pdfIn PDF document text
    • https://s3.amazonaws.com/defipedibe/ceipal_full_form.pdfIn PDF document text
    • http://vutogebufuz.myartsonline.com/11082577203.pdfIn PDF document text
    • http://tafiwepamubov.atwebpages.com/george_foreman_grill_grp99_recipes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec25bbd2-a925-46dc-bca2-9290f213f6a9/how_many_points_is_diary_of_a_wimpy_kid_wrecking_ball.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd0deb56-f68d-40ca-aa70-57ab4a5cca1a/citation_du_petit_prince_avec_la_rose.pdfIn PDF document text
    • https://s3.amazonaws.com/zijivevip/84541609873.pdfIn PDF document text
    • https://s3.amazonaws.com/jadere/how_to_connect_antenna_to_dish_receiver.pdfIn PDF document text
    • https://s3.amazonaws.com/mexesazaxasa/control_cable_selection_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35864974-24c3-46e3-be89-2ce71e4b6d87/48592816271.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42197158-a33b-48ff-9b6f-1cb46fb530f2/illuminati_books_in_malayalam.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_off0000e461.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE461 5276 bytes
SHA-256: 881644428c780c56f4d83a9af52c12310768d35d5d520752ab7efb05b7897046
font_01_sfnt_off0000f637.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF637 10776 bytes
SHA-256: 84bed01751b90c525cf914e11697a977c8ba1aa6284962bf49ba9a7261e594fd

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