Malicious PDF — malware analysis report

Static analysis result for SHA-256 f084d6b217e36ff2…

MALICIOUS

PDF

77.8 KB Created: 2021-05-13 17:24:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 17ca9ec957f0a3eb76ccf4833d9c95f4 SHA-1: 20efa38441ac2f25ed7d92d95da14ee222c7a700 SHA-256: f084d6b217e36ff24ad705be674b96f1c0993aa1aa8f5cbc2f2931ddbe4452c6
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains heuristics indicating it is a malicious redirector and a credential phishing lure impersonating the brand 'Target'. It directs users to a malicious URL, likely to harvest credentials. The ML classifier and ClamAV detection further support its malicious nature. No scripts were extracted, but the PDF structure itself facilitates the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://rupovopijono.weebly.com/uploads/1/3/4/8/134863796/pafuzijo.pdf.
  • 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://yafferge.ru/strik?utm_term=black+and+decker+20v+drill+manual In PDF document text
    • https://cdn.sqhk.co/ditetona/mgQhfjd/ge_universal_tv_remote_control_codes.pdfIn PDF document text
    • https://cdn.sqhk.co/dudavizi/jdigehd/swiftkey_keyboard_app_for_android.pdfIn PDF document text
    • https://rupovopijono.weebly.com/uploads/1/3/4/8/134863796/pafuzijo.pdfIn PDF document text
    • https://cdn.sqhk.co/jotoselu/aJghgcb/hey_clay_birds.pdfIn PDF document text
    • http://mukinumatonewo.getenjoyment.net/reinforced_grouted_brick_masonry.pdfIn PDF document text
    • http://zugasanuko.getenjoyment.net/18448964189.pdfIn PDF document text
    • https://cdn.sqhk.co/xadowififux/ahjQWup/gejunalafisomakodamogo.pdfIn PDF document text
    • https://paseruvuweduzuw.weebly.com/uploads/1/3/1/4/131437476/6759635611.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zuguviwizinu.epizy.com/38581825117.pdfIn PDF document text
    • https://s3.amazonaws.com/paxuvagal/sikemerezetuje.pdfIn PDF document text
    • https://s3.amazonaws.com/lefemijip/59835793786.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a511b601-e77d-4623-a2dd-27e0a459d1a9/zikorewaxepavadit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1cc9fb3-f649-4ee8-8320-7ff0b174a5ef/how_to_sign_up_for_financial_peace_university.pdfIn PDF document text
    • https://s3.amazonaws.com/mamibis/48432619490.pdfIn PDF document text
    • http://metivatozu.epizy.com/wazitonup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db02c609-41a5-4e6b-be9a-5f246c896017/19979773101.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e10dc84-fe29-446e-9c3c-10d197fb4e77/28210773023.pdfIn PDF document text
    • http://jutagejefutix.atwebpages.com/wonosuti.pdfIn PDF document text
    • https://s3.amazonaws.com/rafiralexezol/8335115343.pdfIn PDF document text
    • http://zanatibagewo.rf.gd/mopanubaloxopevora.pdfIn PDF document text
    • http://nisetekotixob.myartsonline.com/how_to_get_my_brother_printer_back_online_windows_10.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_off0000f00c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF00C 5356 bytes
SHA-256: 2958a02bd6e7ee574fadac2d4c5c6d969a1f2474b43076b7b0bb7fce5ea9aefb
font_01_sfnt_off00010232.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10232 11584 bytes
SHA-256: 0c2a8736eeea750fb08b1c515320443cc8caca0d4e9eaabaf63ae8da3b0ba85e

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