Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f94369f0c2125e1…

MALICIOUS

PDF

92.7 KB Created: 2021-02-25 05:23:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 6351a1dd2afe0e3c2a40ff18ef01c032 SHA-1: 0697420a9df2270020b1ffc12eeccb0020014838 SHA-256: 1f94369f0c2125e1e0bb1d41e96229964ceefc5bbb0e52ab187f8e4b67c0d77f
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of embedded URLs, particularly 'https://leonvi.ru/award?keyword=acido+sulfurico+masa+molar', suggests the document is designed to redirect users to potentially harmful websites. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8919

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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://leonvi.ru/award?keyword=acido+sulfurico+masa+molar PDF link annotation
    • http://bathforlegs.xyz/6550193817rxx9m.pdfIn PDF document text
    • http://milanomoda-italy.website/4396972058036la3.pdfIn PDF document text
    • http://axecheat8.xyz/22112115277qya30.pdfIn PDF document text
    • http://maska-respirator.com/guided_reading_activity_chapter_21_lesson_1g5bx6.pdfIn PDF document text
    • http://vostokzapad.su/ethiopian_driving_license_examdbrbg.pdfIn PDF document text
    • http://zoosalon.org/24856743391jrpgn.pdfIn PDF document text
    • http://siondez.ru/800442947170j7t9.pdfIn PDF document text
    • http://italywom.space/zubebupojej82vi0.pdfIn PDF document text
    • http://bigowet.xyz/how_can_schools_reduce_climate_changefsk3v.pdfIn PDF document text
    • http://premial.su/mthfr_folic_acid_build_upcltcn.pdfIn PDF document text
    • http://chestlune.online/92908914755b42nm.pdfIn PDF document text
    • http://form-lnstagramverificationbadge.com/whirlpool_cabrio_dryer_not_fully_dryingidzv6.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/risisipajole/gift_card_box_template_printable.pdfIn PDF document text
    • https://s3.amazonaws.com/bewibiwat/kenmore_gas_dryer_not_heating_all_the_time.pdfIn PDF document text
    • https://s3.amazonaws.com/woxojuxafopuv/performance_appraisal_comments_for_promotion.pdfIn PDF document text
    • https://s3.amazonaws.com/sabobenuwe/royal_canin_puppy_maxi_feeding_guide.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011373.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11373 5156 bytes
SHA-256: fa3c80e7be9f7a671927499ab702d74149b54864c0cdfac44ee103ab74d80960
font_01_sfnt_off000124e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124E6 17728 bytes
SHA-256: 22e862565ec96060ce8f540a4b0d4c1fe4cddbdb9be6502709ab8b50c3c8f148
font_02_sfnt_off00015b2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B2F 16216 bytes
SHA-256: f71143a87cfa4ec60764cba55bd1b0fdb2fb5171727b75959d6a4dbbe3888552