Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8124acca74aaf91…

MALICIOUS

PDF

71.6 KB Created: 2021-04-08 02:17:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cc96e1481e6f3ba0ed9d4a2546d30b0b SHA-1: dd91cc0fc3b3b981399048860927d46f5efe8be9 SHA-256: a8124acca74aaf915cfca8fa74b7a008b6f8b3990d1d0af5329117d2620b92e8
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with the primary one being https://xezojetit.ru/strik. The document body, though heavily obfuscated, suggests a lure related to 'The pursuit of god study guide', likely a pretext to drive users to the malicious URL. No scripts were extracted, but the presence of external URIs points to a downloader or phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://xezojetit.ru/strik?utm_term=the+pursuit+of+god+study+guide
    • https://tozowibalap.weebly.com/uploads/1/3/4/3/134383498/08eb13a8ce6.pdf
    • https://jojonawizofobu.weebly.com/uploads/1/3/1/4/131438175/vadakixo.pdf
    • http://dejivuxa.mygamesonline.org/pdf_que_es_el_autismo.pdf
    • https://cdn-cms.f-static.net/uploads/4416927/normal_6025fb9b93fd1.pdf
    • http://gaximivotekole.mypressonline.com/sample_business_plan_for_nonprofit_organization.pdf
    • http://kosonetibekub.medianewsonline.com/60225079786.pdf
    • http://vykupavto54.ru/draw_ten_pin_bowlingaqrx6.pdf
    • http://cleanup-sale.site/12507304114joapz.pdf
    • https://gadebalemalun.weebly.com/uploads/1/3/4/4/134443756/7298673.pdf
    • https://cdn-cms.f-static.net/uploads/4480895/normal_6017463773431.pdf
    • http://silekutum.medianewsonline.com/bmp_to_file_converter.pdf
    • http://igclienteam.com/muzevupododabewejixenalo1sv.pdf
    • https://bubosetew.weebly.com/uploads/1/3/4/5/134515161/f8a8dbc4c8.pdf
    • https://pudisemibupar.weebly.com/uploads/1/3/4/0/134096773/morejikalawewukoz.pdf
    • https://kademagora.weebly.com/uploads/1/3/4/8/134850034/5200322.pdf
    • https://static.s123-cdn-static.com/uploads/4449788/normal_5ff7861c5347e.pdf
    • http://fajiriduxir.medianewsonline.com/watijagizu.pdf
    • http://allerop.xyz/update_windows_10_mtp_drivers_manuallyzh4xg.pdf
    • https://tilivugex.weebly.com/uploads/1/3/4/1/134108965/8859603.pdf
    • http://vbnmcxz.xyz/is_eating_gluten_free_good_for_weight_loss0y7ji.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fipabadidori.epizy.com/spelling_and_grammar_check_free.pdf
    • http://bozolukiket.epizy.com/63401818009.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_off0000db2e.bin
c092583c649cf0e58dfc1d398de240539f6926910671a54a54518594604c9b47
pdf-font-stream PDF embedded font (sfnt) at offset 0xDB2E 5112 bytes
font_01_sfnt_off0000ec98.bin
cfc08b61c6aa236a9ee41ff7c9f80c817eb266d624219f1bcd4cb9ed6aaed225
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC98 10656 bytes