Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0710cd0ce2e8673…

MALICIOUS

PDF

73.0 KB Created: 2021-03-03 17:00:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 96b9973ecc33da3184927ca14a9652f7 SHA-1: b72078b381395a50c12685d4104e55d4db3ff16c SHA-256: c0710cd0ce2e8673929c89560be5e7a397db63b3e544961224f090883d9840ce
126 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. Heuristics identified it as a link farm on disposable hosting, with numerous embedded URLs pointing to potentially malicious sites. The presence of external URIs and the classification as Pdf.Phishing.Trojan suggest the document is designed to redirect users to phishing or malware-hosting pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://seumenha.ru/strik?utm_term=how+to+program+ge+rc24914-e+remote PDF link annotation
    • http://tepugorotewole.medianewsonline.com/34541733883.pdfIn PDF document text
    • https://kafunonedejo.weebly.com/uploads/1/3/4/6/134662894/9352879.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385635/normal_5fefa977dae9b.pdfIn PDF document text
    • https://romidanunopupef.weebly.com/uploads/1/3/1/1/131163616/komijifukavanud-vanodarawage-mivaseruzesoj.pdfIn PDF document text
    • http://liko-sneakers.com/why_should_you_want_to_be_a_midwife324pe.pdfIn PDF document text
    • https://cdn.sqhk.co/turomixo/mjg5whc/fast_notepad_1._4._4_apk_download.pdfIn PDF document text
    • http://shopyou.online/3_roller_pipe_bending_machineep3z0.pdfIn PDF document text
    • http://crawlmqyu.space/google_sheets_apple_numbersdhawe.pdfIn PDF document text
    • https://nuzuloluxeguvox.weebly.com/uploads/1/3/4/8/134874948/3957082.pdfIn PDF document text
    • https://jojapewabivato.weebly.com/uploads/1/3/1/3/131379205/tafevozolevizes.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389127/normal_5ff1bba35c203.pdfIn PDF document text
    • http://rovanenafet.getenjoyment.net/wikejegofajuzekigukozij.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491159/normal_602adc953037c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487194/normal_601ae506e5dc8.pdfIn PDF document text
    • http://jilavixit.medianewsonline.com/soap_web_services_tutorial_java.pdfIn PDF document text
    • http://pivolirarorip.mypressonline.com/nordictrack_c900_parts_manual.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/muvarelo/ruruguxelejewuvije.pdfIn PDF document text
    • https://s3.amazonaws.com/ropuba/ielts_score_reporting.pdfIn PDF document text
    • https://s3.amazonaws.com/rutufokedizon/zadoxolumanuxagukisa.pdfIn PDF document text
    • https://s3.amazonaws.com/fedure/3839135098.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_off0000e1db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1DB 5556 bytes
SHA-256: 2f64d8369bb027efd5d8ac1590e9098309645d527923e2bdf6537577ab6ad4f2
font_01_sfnt_off0000f4da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4DA 9892 bytes
SHA-256: 1f01f78eb2b18d4957451ab4bf170aec24284f8af69ca053a82400cdb3962b50

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