Malicious PDF — malware analysis report

Static analysis result for SHA-256 27316d949f1aa6b5…

MALICIOUS

PDF

106.4 KB Created: 2021-03-26 05:07:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b9f396d89537d4fd05a47e6c0ef91b88 SHA-1: 68f6639e245c199e5c537e17a31846b4bcf960ed SHA-256: 27316d949f1aa6b56a2c52ab2adec3c489a1ee2798ccf47867fda9dc70fdfcd7
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'zajinet.ru/award' which is likely part of a phishing lure. Although no scripts were explicitly extracted, the presence of embedded URLs and the nature of the detection suggest a phishing attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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/award?keyword=monotheism+and+polytheism+pdf
    • https://lodipututu.weebly.com/uploads/1/3/4/7/134765193/jevototebarofogedabe.pdf
    • http://mixonajoko.iblogger.org/stanford_anesthesia.pdf
    • https://cdn.sqhk.co/tosilura/b7j47rq/guardian_tales_guide_world_2-_5.pdf
    • https://tizojutatow.weebly.com/uploads/1/3/1/4/131406606/7cca58fd18687.pdf
    • https://xesinuvukuwufo.weebly.com/uploads/1/3/0/7/130776104/5906678.pdf
    • http://weduwili.iblogger.org/73114419335.pdf
    • http://nickned.me/tuzidawibemuxolimavawadubipx53.pdf
    • http://boxberry-24.cc/ie-_3000-_8tc_data_sheetfmrdh.pdf
    • https://cdn.sqhk.co/pigexebobe/hcUMVgf/xitubulisipijiju.pdf
    • http://lastmarkt.ru/burutamudevavusoreditivt449f.pdf
    • https://cdn.sqhk.co/guledijuxi/hEHwjbC/arctic_wolf_287bh.pdf
    • https://jilusuno.weebly.com/uploads/1/3/5/9/135958885/dfc18d.pdf
    • https://majojolug.weebly.com/uploads/1/3/4/5/134595566/cde7380f1162.pdf
    • https://cdn.sqhk.co/banifiga/idjd4gc/descargar_earn_money_for_free_with_givvy.pdf
    • http://raifaisentgo.online/suzuki_violin_book_4_piano_accompanimentx1qyb.pdf
    • http://acupofjacob.com/student_exploration_carbon_cycle_answershhxgh.pdf
    • http://pubgucbayim.com/music_album_websites_freeqoxth.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://pakafadudu.epizy.com/what_is_total_coliform_in_well_water.pdf
    • https://s3.amazonaws.com/nosepevozux/3d_text_effect_psd_free.pdf
    • https://s3.amazonaws.com/gupojakami/how_big_is_a_32_bit_int.pdf
    • https://s3.amazonaws.com/zafirawit/34786311344.pdf
    • http://rajasoxavilal.rf.gd/guardian_angel_prayer.pdf
    • http://wokonudiru.epizy.com/79916766981.pdf
    • https://s3.amazonaws.com/panokojol/fidajodup.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016520.bin
87112d2650a1b9b75ed6cfbe375e4c1a0c63dd828b3b456ef36356029e204398
pdf-font-stream PDF embedded font (sfnt) at offset 0x16520 5292 bytes
font_01_sfnt_off00017713.bin
d975c611dcfa452030f40b3b58d6e1d23129f3565de5f6f0b07432c40e25f059
pdf-font-stream PDF embedded font (sfnt) at offset 0x17713 12872 bytes