Malicious PDF — malware analysis report

Static analysis result for SHA-256 d88468d046dc1ae6…

MALICIOUS

PDF

69.6 KB Created: 2021-03-19 21:06:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: dbaaa5794b91646d35b16f4a85d09d9e SHA-1: ea4c5e7e57fdceb5ad4ea430bbacb62c8b6fe335 SHA-256: d88468d046dc1ae66fbc3f09c6c3b73bb4896e39eb3616001ec309319ae7bc8f
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and 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 0.9997

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://crophysi.ru/wix?keyword=geometry+dash+full+version+free+apkpure PDF link annotation
    • https://gixeroparot.weebly.com/uploads/1/3/4/5/134586235/f1c817a6d4050.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374848/normal_6041cbadd4cd2.pdfIn PDF document text
    • http://revujutipisan.22web.org/assassin_s_creed_odyssey_ps4_code.pdfIn PDF document text
    • http://manovina.mypressonline.com/2012_grand_cherokee_overland_value.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490918/normal_5ffb7bd118d3a.pdfIn PDF document text
    • http://vumexovuvelafe.medianewsonline.com/16758826385.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377377/normal_603b23f9eca2b.pdfIn PDF document text
    • http://zomixuxoluzijum.mywebcommunity.org/spoken_english_syllabus_for_beginners.pdfIn PDF document text
    • http://fitukogamoj.iblogger.org/53961595566.pdfIn PDF document text
    • http://napelafaromoj.22web.org/77846012822.pdfIn PDF document text
    • https://momobalujinas.weebly.com/uploads/1/3/2/3/132303205/3798277.pdfIn PDF document text
    • http://lobabinuladeri.medianewsonline.com/1914384626.pdfIn PDF document text
    • https://dopupuwupexiro.weebly.com/uploads/1/3/0/8/130813117/wilitewi_sipun_javarawiwa_wutawudibo.pdfIn PDF document text
    • http://lisipezasuk.iblogger.org/38381258758.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nizalag.rf.gd/amasezerano_ya_arusha.pdfIn PDF document text
    • https://32cf4326-ba62-484c-a3ca-05d02c2dd2e5.filesusr.com/ugd/0b46e6_8b1e3c849a1e438d804643049ade3232.pdf?index=trueIn PDF document text
    • http://zixagoku.rf.gd/carenado_pc12_manual.pdfIn PDF document text
    • https://97783159-ced7-426e-9fbd-60d2bb3342fb.filesusr.com/ugd/00058f_854621ca82e54e80b866a04f3179c95e.pdf?index=trueIn PDF document text
    • http://motirovaribepok.rf.gd/jeginegigazimaganijefa.pdfIn PDF document text
    • http://rofuvawitarul.atwebpages.com/81067270155.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE29 5540 bytes
SHA-256: e3e7382ba598d0df524fb36c6cb7ea03c136eeb97c8b66b8e8e46bec1bb06886
font_01_sfnt_off0000e0e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0E3 14684 bytes
SHA-256: c5da27d06f3895c66d2131f54aae1ee784cc60ca85c47e42480a303573ca4a5f

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