Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf3dfdc222c90ec0…

MALICIOUS

PDF

73.8 KB Created: 2021-02-24 15:45:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 09e786eefa9c9801f7b9503adb307efd SHA-1: 6d746cec7e36760c451b40390a583e42d0d25149 SHA-256: bf3dfdc222c90ec06a0c5c5eb4732ff5af607e1e37f86e02557d80ed8244bbb0
264 Risk Score

Malware Insights

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

This PDF file contains numerous embedded links, many of which point to known malicious redirectors or disposable hosting, indicating a link farm or phishing attempt. The heuristic 'SE_CALLBACK_LURE' suggests a potential callback phishing or tech-support scam pretext. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 7

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • 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.
  • 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://crophysi.ru/123?utm_term=adobe+premiere+pro+2+mp4+plugin In PDF document text
    • https://cdn.sqhk.co/kowumutajaw/jeNjjYR/united_nations_sdg_goals.pdfIn PDF document text
    • http://nigavereke.mygamesonline.org/fejojanitok.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451744/normal_6000617760f13.pdfIn PDF document text
    • https://ziwuvofoxovexo.weebly.com/uploads/1/3/1/1/131163777/mepirarexot-birezolut.pdfIn PDF document text
    • https://koxiguxizabi.weebly.com/uploads/1/3/1/1/131163763/modubufet-kunilesekojutar-xexurexuzixot.pdfIn PDF document text
    • https://cdn.sqhk.co/pulafefer/QmGgdUF/59490033981.pdfIn PDF document text
    • https://cdn.sqhk.co/feguzuvubut/fLGaT6P/1402719956.pdfIn PDF document text
    • https://mebodamuruwij.weebly.com/uploads/1/3/5/4/135400263/joxigilakojezesuw.pdfIn PDF document text
    • https://jinimajaloxole.weebly.com/uploads/1/3/5/3/135314869/gumexijoseto.pdfIn PDF document text
    • https://cdn.sqhk.co/kuzetuzame/gejiOwS/6055148787.pdfIn PDF document text
    • https://wimiwimevodozaz.weebly.com/uploads/1/3/0/8/130874111/8457641.pdfIn PDF document text
    • https://cdn.sqhk.co/xaxamipuxum/haDv3jc/apple_smart_charger_iphone_x.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460954/normal_5fca2fce45859.pdfIn PDF document text
    • http://rowowevu.mypressonline.com/xiderunanibokabewaje.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/fexuror/powerpoint_circle_chart_template.pdfIn PDF document text
    • https://s3.amazonaws.com/kefiperizonofu/mp_state_open_school_duplicate_marksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/dinigugaxej/89325707368.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_off0000e129.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE129 5240 bytes
SHA-256: 992a43d432831adff42356725ff48af20611fb3f5696ffa9afeffcd7a3257d74
font_01_sfnt_off0000f2eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2EB 11076 bytes
SHA-256: 617286d64e2b0f2c1f9d69363e92675f7b52b716c41ab1e282aa05522358ef4c

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