Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa2e7ffbf9f076df…

MALICIOUS

PDF

76.0 KB Created: 2021-03-07 03:39:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 53329c41b34c2a6487cf429b60cb4afa SHA-1: 16c1a0b2cb26b1b4243f0915ee01ba02cc4207da SHA-256: aa2e7ffbf9f076df7dce6413ad635d211571430ff21360a757c9386b44f9aa66
96 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 an embedded URI pointing to a suspicious domain, likely intended to trick the user into downloading a secondary payload or visiting a phishing site. The document body, though heavily obfuscated, suggests a lure related to 'formulas open office'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jumiwimov.ru/123?utm_term=how+to+do+formulas+open+office PDF link annotation
    • http://fb-ig-violation.com/7724792465h3kbz.pdfIn PDF document text
    • http://lomidal.mygamesonline.org/selebaretudexutodepafatux.pdfIn PDF document text
    • http://gimatadokij.mygamesonline.org/what_was_the_first_english_translated_bible_called.pdfIn PDF document text
    • http://vinadulateg.22web.org/nc_cdl_general_knowledge_test_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/kagelemovo/ghgfk9i/the_impossible_quiz_2_answers_level_14.pdfIn PDF document text
    • http://leninuludobodu.mygamesonline.org/9021763048.pdfIn PDF document text
    • http://antonioit.fun/cyperus_odoratus2d0oj.pdfIn PDF document text
    • https://cdn.sqhk.co/vakolitakap/gdAgiic/fujegozepe.pdfIn PDF document text
    • https://cdn.sqhk.co/xixumobun/lZgeVIc/best_off_road_tires_for_jeeps.pdfIn PDF document text
    • https://cdn.sqhk.co/xexisini/DzmjheI/10918879719.pdfIn PDF document text
    • http://dulotor.iblogger.org/linksys_e8350_access_point.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/jevelel/zapidiweduj.pdfIn PDF document text
    • https://s3.amazonaws.com/lofese/70746485154.pdfIn PDF document text
    • https://s3.amazonaws.com/sedimeraxufi/85896463148.pdfIn PDF document text
    • http://goduzidexemave.epizy.com/19539585490.pdfIn PDF document text
    • http://wojibikifi.myartsonline.com/30074535008.pdfIn PDF document text
    • https://s3.amazonaws.com/mogedozara/bubble_chart_in_google_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/sinadi/perewaselekaxedezojovira.pdfIn PDF document text
    • https://s3.amazonaws.com/najipavez/john_deere_garden_tractor_price_list.pdfIn PDF document text
    • http://bodiluduf.rf.gd/modeling_photosynthesis_and_cellular_respiration_lab_answers.pdfIn PDF document text
    • http://nevozabewovezo.epizy.com/new_home_antique_sewing_machine_table.pdfIn PDF document text
    • https://s3.amazonaws.com/julaxel/hadoop_the_definitive_guide_github.pdfIn PDF document text
    • https://s3.amazonaws.com/lezopobigeza/pujotuz.pdfIn PDF document text
    • https://s3.amazonaws.com/nonabafat/how_to_change_batteries_howard_leight_impact_sport.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/91487034454.pdfIn PDF document text
    • http://tiruweditivunaw.myartsonline.com/matlab_plot_line_width.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_off0000eac7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC7 5356 bytes
SHA-256: 1994b7bc5b9a769062f2bd4d45d4129a2030c31ee7302ac7199800cbe1822813
font_01_sfnt_off0000fcf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCF4 11024 bytes
SHA-256: aee13fe40a840b587b6519c487e18dfc8f5431dbfb179364ac0f8dfcad7f7483

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