Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbe2a08f69cee093…

MALICIOUS

PDF

81.0 KB Created: 2021-03-25 10:12:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ae2d5f0be052ac0be471945b8b434b8b SHA-1: 33c25f82bf507c41a1601e63f73ceacc1bcd52cd SHA-256: cbe2a08f69cee09382eb44f60bae1f983bf4e185f17c78723fa5bcf15d8375ba
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. The document body, though heavily obfuscated, contains references to a 'kitchenaid whisper quiet ultima dishwasher manual' and the wkhtmltopdf application, suggesting a lure. A critical heuristic identified an external URI pointing to 'nipisod.ru', which is likely the malicious destination for the phishing attempt or payload download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://nipisod.ru/wix?keyword=kitchenaid+whisper+quiet+ultima+dishwasher+manual
    • https://cdn.sqhk.co/nuvaratuji/pV7jjhe/xiwodumejotirujikane.pdf
    • https://cdn.sqhk.co/xafiguzi/fAMgihd/fikuwab.pdf
    • http://kubifadim.iblogger.org/fogamexirutitumefi.pdf
    • https://cdn.sqhk.co/xobabowiwa/SbiefQD/52215584425.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/pilazi/bulumin.pdf
    • https://s3.amazonaws.com/zugutixe/6887637264.pdf
    • https://s3.amazonaws.com/nisiwanolom/78194454948.pdf
    • https://s3.amazonaws.com/sukobogixe/c3_exponentials_and_logarithms_worksheet_a.pdf
    • https://s3.amazonaws.com/purawuma/converse_high_platform_black.pdf
    • https://s3.amazonaws.com/napoledunadigo/aquaterra_spas_fairfax_manual.pdf
    • https://s3.amazonaws.com/wanasuvedigo/hp_g62_laptop_motherboard_replacement.pdf
    • https://uploads.strikinglycdn.com/files/35a57c1f-9c9f-4c60-af6a-79e828d791aa/breadman_ultimate_plus_bread_machine_manual.pdf
    • http://kugikejovapav.rf.gd/4409968046.pdf
    • https://s3.amazonaws.com/tubukeganuji/38420785676.pdf
    • https://s3.amazonaws.com/banula/theme_park_game_mod_apk.pdf
    • https://s3.amazonaws.com/resisuna/85569140233.pdf
    • https://uploads.strikinglycdn.com/files/dd2b9e91-6b0d-4685-85e6-23a9c33d1770/rexadolibogenexaxe.pdf
    • https://s3.amazonaws.com/kikunojulejuj/division_chart_1-100.pdf
    • http://wikatamuk.rf.gd/baby_emoji_pictionary_game_answers.pdf
    • https://s3.amazonaws.com/wiwuxot/cambrian_era_life_forms.pdf
    • https://uploads.strikinglycdn.com/files/71e26f2e-cbbc-43c5-8663-9d135a8e7983/white_christmas_song_lyrics_printable.pdf
    • https://s3.amazonaws.com/ronatiduzoxij/tebemegokerekuwad.pdf
    • https://s3.amazonaws.com/gezetega/crime_statistics_south_africa_2019.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_off0000fb02.bin
0562cd8ebeddd6d709c47df2b0cacd9966e189289906a15dd7c69d547e2367e2
pdf-font-stream PDF embedded font (sfnt) at offset 0xFB02 5500 bytes
font_01_sfnt_off00010da4.bin
62ba8b4409b43e3320162465385a0c2197a8789aa90c8ea173813727600561eb
pdf-font-stream PDF embedded font (sfnt) at offset 0x10DA4 11804 bytes