Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd1785f655a0db00…

MALICIOUS

PDF

72.6 KB Created: 2021-04-04 11:25:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 35a48063cd655d1d18d69983bd2d4044 SHA-1: bf7bf1894f5f237523373270189b0cf33580f86e SHA-256: fd1785f655a0db0060fd527414ae630779266ca2ec5830ae8d6d2bd3b98c854f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1204.002 Malicious Link

The file is identified as malicious by ML classifiers and ClamAV, with high-confidence heuristics indicating it's a payment redirection lure and a callback phishing lure. The document body, though heavily obfuscated, suggests a context related to bank forms, aligning with financial fraud schemes. The presence of multiple unknown URLs further supports the malicious intent, likely serving as redirects or download sources for further stages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://ponafet.ru/award?keyword=andhra+bank+cheque+book+request+form+pdf PDF link annotation
    • http://reassurez-moi-fr.info/barrons_gre_word_list_1100z2fos.pdfIn PDF document text
    • http://vizionsmc.net/802615747977e8gu.pdfIn PDF document text
    • http://collegegraduatecentraldating.com/haier_air_conditioner_owners_manual284ts.pdfIn PDF document text
    • http://reliables.ru/idle_monster_td_mod_apklg5yf.pdfIn PDF document text
    • http://izzzaaa.space/pixudimidezapababipekanm8uf4.pdfIn PDF document text
    • http://regsenatvumen.website/15165946744taas4.pdfIn PDF document text
    • https://cdn.sqhk.co/posaleren/nfoijib/how_do_basketball_fall_games_work.pdfIn PDF document text
    • http://job-finder.space/814690180026s31r.pdfIn PDF document text
    • https://cdn.sqhk.co/kigimole/Ghajbhd/greatest_hits_of_the_80s_and_90s.pdfIn PDF document text
    • http://ca-manalapan.space/certificate_frame_png_free9ak0n.pdfIn PDF document text
    • https://cdn.sqhk.co/vakusukereju/dfGathb/20278860347.pdfIn PDF document text
    • http://keburej.22web.org/sefejeleziluw.pdfIn PDF document text
    • http://intekzafast.online/gosport_war_memorial_hospital_report_2018ahkcg.pdfIn PDF document text
    • http://nosinoski.shop/sofewumezagadelipijugs08g.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/dazinibonofobi/juzudixipadidup.pdfIn PDF document text
    • https://s3.amazonaws.com/tojabixefova/ameristep_replacement_ladder_sections.pdfIn PDF document text
    • https://s3.amazonaws.com/lukepepe/mobogenie_lite_apk_latest_version.pdfIn PDF document text
    • http://jupefavasareje.rf.gd/catheter_associated_bacteremia_guidelines_idsa.pdfIn PDF document text
    • https://s3.amazonaws.com/nafibanefexex/46693280327.pdfIn PDF document text
    • https://s3.amazonaws.com/kokesatodixon/lixuwusobas.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE0A 5684 bytes
SHA-256: f3529ca884ea31a2701f1130f362f7159b146033a052af23eb134fa47903f246
font_01_sfnt_off0000f129.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF129 10536 bytes
SHA-256: 71a1f63042baf7844286e4f693921725affb298b913136870fd2e842406122e7

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