Malicious PDF — malware analysis report

Static analysis result for SHA-256 948c12db96f73135…

MALICIOUS

PDF

83.5 KB Created: 2021-06-05 14:40:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 15d6b69b48cd0ce2f4387aabe6694edb SHA-1: 7246b284f535c05fd1481f97f1203243bb9cdc43 SHA-256: 948c12db96f731356b1434c09aa954ecde9c327246d09bf11e0117707d77dfd4
66 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • 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://coretry.ru/pbw?utm_term=chronicon+leveling+guide PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4450259/normal_5fdefa5c84601.pdfIn PDF document text
    • https://wevapagavum.weebly.com/uploads/1/3/4/3/134306171/vudavudufiv-tuwafebesogub.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4482860/normal_60b0073740ae7.pdfIn PDF document text
    • https://tokoposejod.weebly.com/uploads/1/3/1/3/131380771/9232304.pdfIn PDF document text
    • https://bidubemawekewar.weebly.com/uploads/1/3/0/8/130815124/ralebuzibedisudon.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498645/normal_6010ab7a44b10.pdfIn PDF document text
    • https://tazegeravi.weebly.com/uploads/1/3/5/3/135390309/6566346.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484804/normal_5fe932b8e3154.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458404/normal_60488b9156a76.pdfIn PDF document text
    • https://zokaguwozan.weebly.com/uploads/1/3/0/7/130738936/585635.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kafunujazuwo.pbworks.com/w/file/fetch/144568065/32263950733.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4af71d27-d0dc-4659-8826-54a91b6afdc3/pugemetunapiveriva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2aee863d-3639-489e-9d64-31e1722c8865/cheech_and_chong_2_full_movie_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c4651f9-4870-4964-a61b-dea67a856d38/57994800808.pdfIn PDF document text
    • http://neruwuk.pbworks.com/f/printable_calendar_2021_may_through_august.pdfIn PDF document text
    • http://fodorafirig.pbworks.com/w/file/fetch/144562365/zekofupagafojanesivegalog.pdfIn PDF document text
    • http://xetibubib.pbworks.com/f/42503884561.pdfIn PDF document text
    • http://biduzoku.pbworks.com/f/82159564810.pdfIn PDF document text
    • http://lakebimutep.pbworks.com/f/kane_chronicles_book_3_weebly.pdfIn PDF document text
    • http://fixulirulafa.pbworks.com/f/zujikujojolutasu.pdfIn PDF document text
    • http://xuwajesorewo.pbworks.com/f/autotrader_classic_vw_beetle.pdfIn PDF document text
    • http://wuvebag.pbworks.com/w/file/fetch/144428550/fundraising_thermometer_graphic.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f374.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF374 4780 bytes
SHA-256: b78faae060858cf875f6c6ed4657be9cc68e7c51e8ca213f8a8a860e09a0c6cd
font_01_sfnt_off000103b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103B1 11148 bytes
SHA-256: ae0c33b56bb721bea8798dc04e1819a96f2f16577f6381fc411f224fefc26074
font_02_sfnt_off00012a02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A02 16060 bytes
SHA-256: 9fce2e558c7eba93e9b4ba87b790c422cf9490aab73fe875614431ac3e7f116a

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