Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f7952655fbe45dd…

MALICIOUS

PDF

71.4 KB Created: 2021-01-04 23:32:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 5e9bdf325f5f472bf981fd995638d30f SHA-1: 786116954fee07ca4cd8bce6361f0dcd33f4e852 SHA-256: 9f7952655fbe45dd156cefd3a46b777267d797a03f567dc9e1e561b573788a42
244 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to disposable hosting services and redirectors, indicating a link farm designed for SEO manipulation or phishing. The presence of a link to a known malicious redirector and ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests malicious intent. The document body, though heavily obfuscated, contains text related to 'nba live mobile unlimited money apk', likely a lure to encourage clicks on the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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://traffmen.ru/123?utm_term=nba+live+mobile+unlimited+money+apk In PDF document text
    • https://nitikado.weebly.com/uploads/1/3/4/6/134660078/gezibetobedi.pdfIn PDF document text
    • https://wagizubim.weebly.com/uploads/1/3/4/4/134470033/19eac241.pdfIn PDF document text
    • https://nokuzase.weebly.com/uploads/1/3/4/7/134765685/lidimolulu_giwetesolip.pdfIn PDF document text
    • https://devuzagobeli.weebly.com/uploads/1/3/4/4/134431767/zaxigikakaziv.pdfIn PDF document text
    • https://sevimuxeso.weebly.com/uploads/1/3/0/7/130739978/dirofuvilexez.pdfIn PDF document text
    • https://dupujemewo.weebly.com/uploads/1/3/4/0/134040979/jifofatatuli.pdfIn PDF document text
    • https://rojaduvesasesa.weebly.com/uploads/1/3/4/7/134751848/mamopuzomukalu_jamerig_xexumip.pdfIn PDF document text
    • https://gapefupekud.weebly.com/uploads/1/3/1/8/131871489/xededip.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/153f36fe-acc1-4b38-936f-b46be24e293a/fscapture_for_mac.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43d16a91-0297-48be-896d-d42dafb0ab9c/tuxumegafudawudofar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68a79222-2b06-43e4-9fdf-964cf6425809/simone_parker_bio.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ccbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCBC 5048 bytes
SHA-256: 2b5ae5cf326c9c780b98966e61c6cb0ae13b40df13d5e16bebf0487a489d4eef
font_01_sfnt_off0000dddf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDDF 10664 bytes
SHA-256: 3587743ed3b1b5fb8e6b71c9454bbe14f2b60b2f370f4ad938670626d4199644
font_02_sfnt_off00010273.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10273 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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