Malicious PDF — malware analysis report

Static analysis result for SHA-256 93678ae469cf1ed8…

MALICIOUS

PDF

154.1 KB Created: 2021-07-12 21:40:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ddcc2059779fa6ed57524b65528ffbc9 SHA-1: ffc7d919e41f43c397b17f1197cdcac8933cb2eb SHA-256: 93678ae469cf1ed8e6192df938aafa4367053ca135804dfa132784b505b7beb2
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by a machine learning classifier and ClamAV. It contains embedded URLs, suggesting it is part of a phishing campaign or a delivery mechanism for further malware. The obfuscated document body and the presence of external URIs indicate an attempt to conceal malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9503

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://feedproxy.google.com/~r/sq/ugae/~3/qI_NY8u86tA/square?utm_term=carrying+a+weapon
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e80c4680504e0a776b7f34/1625820231338/australian_actresses_in_their_60s.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ec84af2de985067773a1ac/1626113199944/why_do_you_want_to_work_for_our_company_answers.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e9156fc4c1a734c5d64754/1625888112047/what_does_yw_mean_in_texting.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e8849e9030b901b131174d/1625851038412/front_end_estimation_meaning.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec8118700aa07a7894b840/1626112280730/iodometric_titration_of_copper_sulphate_with_sodium_thiosulphate.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e947f93b7e7c6334517a77/1625901049260/vocabulary_workshop_level_c_unit_6_synonyms_and_antonyms.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec7e48d0153e73bf8b3e2f/1626111560802/game_dev_tycoon_mobile_apk.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e8ad3651c23d46c465de74/1625861430173/26807127400.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e90615c14ff043cd5bbf9a/1625884181283/83208064513.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001fcd8.bin
74181d3435f4b3b7ca37106b59df5f34ad096a8b97ee0951c3b626ab6840d845
pdf-font-stream PDF embedded font (sfnt) at offset 0x1FCD8 10344 bytes
font_01_sfnt_off00021459.bin
8ddb58a2e877f81557b42d87a75aeff58c579f08c0a0dc39fcd28bd954980348
pdf-font-stream PDF embedded font (sfnt) at offset 0x21459 17892 bytes
font_02_sfnt_off000243e6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x243E6 16792 bytes