Malicious PDF — malware analysis report

Static analysis result for SHA-256 5677421c1d127303…

MALICIOUS

PDF

110.7 KB Created: 2021-02-26 08:24:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 8921dac2c3676accc33ae824dc09a677 SHA-1: 90287ba01a681067c10262d5e75d6f27a72c01f9 SHA-256: 5677421c1d12730369d098cbd74a6555cbbcd66ee84a5e96bcd9125e5352ff55
126 Risk Score

Malware Insights

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

The PDF document contains multiple external URIs, with one specifically mentioning 'how to apply for a nike sponsorship' and pointing to a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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://baarspo.ru/123?utm_term=how+to+apply+for+a+nike+sponsorship PDF link annotation
    • https://cdn.sqhk.co/nixagigad/eIjiihj/change_eye_color_app_iphone.pdfIn PDF document text
    • https://cdn.sqhk.co/vixukose/Aij3ieu/equipaje_adicional_air_canada.pdfIn PDF document text
    • http://wejuzofibab.medianewsonline.com/dinepadubulizomovixox.pdfIn PDF document text
    • https://cdn.sqhk.co/rogudokives/eGgf4gh/tennessee_titans_game_next_week.pdfIn PDF document text
    • http://vajogeboru.iblogger.org/lasolajo.pdfIn PDF document text
    • https://cdn.sqhk.co/mumesimasozo/aJrih0I/wodogebofimagefisereme.pdfIn PDF document text
    • https://cdn.sqhk.co/vanewano/jjjjbzI/aarp_insurance_login.pdfIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sepovutapakogaf/fagogawekepironor.pdfIn PDF document text
    • https://s3.amazonaws.com/zalisujezajaje/dikugabanufolavatenow.pdfIn PDF document text
    • http://rovarede.rf.gd/23345991618.pdfIn PDF document text
    • https://s3.amazonaws.com/dukavunivifa/49955911401.pdfIn PDF document text
    • http://turojupa.epizy.com/aha_2018_lipid_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/tiluwisulepam/gogifomubujofazemujaf.pdfIn PDF document text
    • http://busugotuwege.epizy.com/1685300814.pdfIn PDF document text
    • http://jufebiwewizeza.rf.gd/14143274841.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://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00015bb4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x15BB4 10228 bytes
SHA-256: c9801d0ce7d78cc2034ddc48c2d280fceaee7b5a245c339836cba4b2167886f7
font_00_sfnt_off00013fb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FB3 2900 bytes
SHA-256: a28fcc4ba65d8171a55e8b87d646ac5d1dd213f66ab2b0026fd39e5ca5d32d1a
font_01_sfnt_off000149f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149F5 5208 bytes
SHA-256: cacfa78c00cfa36659dc258e25302d706c3ffd19f1c272da798d6f99e0172ed3
font_03_sfnt_off000178a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x178A6 21636 bytes
SHA-256: e2d1cabdfa2ba90c544a3ec3aecd2e1fca66db90780c0abb9b09ff9f89e9a609

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