Malicious PDF — malware analysis report

Static analysis result for SHA-256 567392406b96a913…

MALICIOUS

PDF

75.3 KB Created: 2021-04-02 16:53:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 5c3dc2f49bbe8ee37da8971b1d1a0712 SHA-1: 4afccebc8e3fee2eca87b48c06677df9e0affdf4 SHA-256: 567392406b96a913f4ee24b7084bb3c57a6b3d27f7f5c18f927e7c3d6c6aa871
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to link farms hosted on disposable domains, suggesting a phishing or content-farming scheme. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the ML classifier output strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of external URIs and the overall structure point towards a phishing attack that likely uses a malicious link to redirect the user to a secondary payload or phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://leonvi.ru/wix?keyword=area+of+parallelogram+vectors PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4405197/normal_602aebd79885b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479718/normal_5fdf027f13da7.pdfIn PDF document text
    • http://vodizurulenega.mypressonline.com/minobosifozugatologidofap.pdfIn PDF document text
    • http://damapilob.iblogger.org/68257337658.pdfIn PDF document text
    • https://damobupakul.weebly.com/uploads/1/3/1/4/131453350/31ecf8c47f479e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466386/normal_5fdd949f295b8.pdfIn PDF document text
    • http://pewuzixuk.iblogger.org/bel_ami_english_translation.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472793/normal_60336316edf1e.pdfIn PDF document text
    • https://ruvawuwejijexut.weebly.com/uploads/1/3/0/8/130814193/48ca27fbf16c41.pdfIn PDF document text
    • https://wotipivas.weebly.com/uploads/1/3/1/4/131482993/rebitokiketukafaj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://runaredikulenin.epizy.com/catalase_test_microbiology.pdfIn PDF document text
    • http://pimoxonevuwewax.atwebpages.com/88100074716.pdfIn PDF document text
    • https://s3.amazonaws.com/sojebelevenex/lord_of_the_rings_movies_hindi_dubbed_download_filmyzilla.pdfIn PDF document text
    • https://s3.amazonaws.com/zunewidimem/kuwaramekolukadazur.pdfIn PDF document text
    • http://fasudum.rf.gd/nabuzatedil.pdfIn PDF document text
    • https://cb38ef3f-1f2c-4622-8962-dca261660167.filesusr.com/ugd/3ae201_3b71b874b4e34fdea532f5174312dcf8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tevomenil/nibetevikesesakewog.pdfIn PDF document text
    • https://47c0d0ed-94e3-447f-940a-e265262d053f.filesusr.com/ugd/a43ec6_eeced6c06acb437ea6ef237c652996c8.pdf?index=trueIn PDF document text
    • https://bff5fdab-9fd0-4670-908b-a1308bb5a9cb.filesusr.com/ugd/227d0f_c29b0674a670464fb4dc1a588e103f93.pdf?index=trueIn 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_off0000e577.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE577 5384 bytes
SHA-256: eb65afd95d3dfc1d986049736df03bb28cab2d7d3b785d07c41f08d9cd38b510
font_01_sfnt_off0000f7c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C2 11824 bytes
SHA-256: 5787fc8494ff9f75fa7a5bd9cd3fed04f7ee2b28fd4db4ec46b4382be10b84c7

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