Malicious PDF — malware analysis report

Static analysis result for SHA-256 468d152f9cca0c36…

MALICIOUS

PDF

161.9 KB Created: 2021-04-05 04:52:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 49eaf0a0f13a8decaf6ec6d9cbcfcb90 SHA-1: 4af2e67dd65b018c72e6a376ae2dafea12a840d3 SHA-256: 468d152f9cca0c3651285865103d523da0d811291a8d7939c3bea33d7f0cee6a
126 Risk Score

Malware Insights

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

The PDF file contains numerous external URIs, with a primary focus on a URL associated with a 'top 10 banned games apk' lure. Heuristics indicate this PDF is part of a link farm on disposable hosting, suggesting a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or trojan delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9673

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pelibifir.ru/123?utm_term=top+10+banned+games+apk PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4486984/normal_6066cbcb26cc4.pdfIn PDF document text
    • https://nuzixusimupe.weebly.com/uploads/1/3/4/3/134306281/c6fdf153279f.pdfIn PDF document text
    • https://legunumazonum.weebly.com/uploads/1/3/4/4/134455594/5454204.pdfIn PDF document text
    • https://gobodanugamo.weebly.com/uploads/1/3/4/8/134862857/3842756.pdfIn PDF document text
    • https://bujakisuka.weebly.com/uploads/1/3/2/6/132695398/gapidifilenegu-puluromi-liwubibirejetig-fafonafexiduwug.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407989/normal_605952003fb87.pdfIn PDF document text
    • http://gejurabek.getenjoyment.net/algebra_ii_textbook.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477373/normal_5fe3a34a3fa69.pdfIn PDF document text
    • http://pugisapi.mypressonline.com/alexander_mcqueen_biography.pdfIn PDF document text
    • https://bewirupudafa.weebly.com/uploads/1/3/1/6/131607000/8074259.pdfIn PDF document text
    • https://gikunagab.weebly.com/uploads/1/3/0/7/130738902/momugixirulumize.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408462/normal_5ffed46c87fc1.pdfIn PDF document text
    • https://wadonado.weebly.com/uploads/1/3/4/6/134677460/lapisapujekatu_rifotud_xiveliwikosoxab.pdfIn PDF document text
    • https://besuweleterum.weebly.com/uploads/1/3/2/8/132814030/6450058.pdfIn PDF document text
    • https://titerafutar.weebly.com/uploads/1/3/0/7/130775646/roporudake.pdfIn PDF document text
    • http://milesatel.mygamesonline.org/calendar_ortodox_2020_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472186/normal_605d8edbd1558.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://s3.amazonaws.com/bejexe/vorobogura.pdfIn PDF document text
    • http://varirojemixu.myartsonline.com/dorigetus.pdfIn PDF document text
    • http://gefuwaw.atwebpages.com/89536174393.pdfIn PDF document text
    • https://4b0cdf75-2e42-4830-99f1-bbdbaec3f661.filesusr.com/ugd/891219_7e2b466bd6fa4537bb70cdea9923078e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bidivo/altistart_48_manuel_franais.pdfIn PDF document text
    • https://f3e0ee59-b309-4736-aefa-1db4f942b0be.filesusr.com/ugd/e87662_6e66141942564101915d2d0d5a532801.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/senodiw/11079514441.pdfIn PDF document text
    • https://7afcd0b8-98df-42a4-afe0-9544d44c9539.filesusr.com/ugd/74e9cf_84a1062f6a764a60a536854265a6142d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/julaxel/78656701440.pdfIn PDF document text
    • https://s3.amazonaws.com/vebisop/bikigarobiwunenazobuwijow.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001e5bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E5BB 8364 bytes
SHA-256: f902c39a8ef6ebc56495ea716ed31ba4e3e1d34e753ccb6661b0acb8c5880268
font_01_sfnt_off000201c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x201C5 5500 bytes
SHA-256: 7c464282347266a3dbaf2ef4563bf014f7079b644623368da33dd815a9b24fe0
font_02_sfnt_off00021461.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21461 10004 bytes
SHA-256: 4df4a4edec5a3d86647b6c2a176db2668d781ba15805dbb080cce683a2b33190
font_03_sfnt_off000230c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x230C0 13800 bytes
SHA-256: 8c35c1f05be67598d466ff4ea2ac61ff94a46960dfe0fcb58a566487b7b8640e
font_04_sfnt_off00025d33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x25D33 17720 bytes
SHA-256: de939eac5a9d38c41c59393abad00bae834deca342625c82855604680a1c6b5f

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