Malicious PDF — malware analysis report

Static analysis result for SHA-256 06e5d5ee86cedd66…

MALICIOUS

PDF

80.7 KB Created: 2021-03-23 18:55:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3e0d4655744c6da87b89a8426f561123 SHA-1: 7c4deb7d5f1b56ab1c9377dbc6349554c73cfb5e SHA-256: 06e5d5ee86cedd66d2a3b4f69bdbd5642559c93952eda245f4621ba41a973b39
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which appear to be part of a link farm designed to manipulate search engine results. The primary URL suggests a lure related to advertisement writing, likely to direct users to malicious content or phishing pages. ClamAV and ML classifiers strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://kuzutuzo.ru/wix?keyword=how+to+write+a+good+advertisement+schwab+pdf
    • https://duxoberadu.weebly.com/uploads/1/3/4/7/134718286/jifizosetukovigu.pdf
    • http://idealslimitalia-oficial.site/tomaxipusedegj2x.pdf
    • https://lumovomudin.weebly.com/uploads/1/3/4/7/134704265/349984.pdf
    • https://static.s123-cdn-static.com/uploads/4464732/normal_5fe1426659a21.pdf
    • https://cdn-cms.f-static.net/uploads/4370284/normal_604a2fb5b27fd.pdf
    • https://cdn-cms.f-static.net/uploads/4451374/normal_604cf2f402171.pdf
    • http://triple-doska1.club/sarenafaveworuwelasawe9f7v8.pdf
    • http://stassikorskyi.com/579415660791oraz.pdf
    • https://sunajojafexa.weebly.com/uploads/1/3/1/8/131856627/7266073.pdf
    • https://cdn-cms.f-static.net/uploads/4485576/normal_6035cd24cd3bb.pdf
    • http://fisitupogavi.mypressonline.com/why_is_my_contour_box_blinking_red.pdf
    • https://cdn-cms.f-static.net/uploads/4464707/normal_5fda3c81abae9.pdf
    • https://lexizade.weebly.com/uploads/1/3/4/3/134368494/7754451.pdf
    • http://dommasters.site/geronimo_stilton_collection_booksaq5ig.pdf
    • http://pelinebaj.mypressonline.com/pekegagireg.pdf
    • https://cdn-cms.f-static.net/uploads/4475989/normal_6047b7ca56d80.pdf
    • https://cdn-cms.f-static.net/uploads/4474722/normal_604aa6abc50c0.pdf
    • http://cashbackmoney.info/nugupanolonbrlp.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://votixeju.onlinewebshop.net/begomajoxovogemiri.pdf
    • http://danesanifulen.rf.gd/73019230003.pdf
    • http://viwudajokufado.atwebpages.com/23333033189.pdf
    • http://povuputuk.epizy.com/carriers_2009_full_movie.pdf
    • http://vanidedafi.epizy.com/varicela_gpc.pdf
    • http://vipebajivakal.epizy.com/fractions_worksheet_5th_grade.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb66.bin
57ded5a743b5013fcae32c28e6225868fc1eaa7b92b5d6574620dfbc93c8795c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB66 5788 bytes
font_01_sfnt_off00010f06.bin
4f936e38449a2d69db45ddca87d4a6bfc0ce2df7e8519e39610f0c9d0466fa54		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10F06 11164 bytes

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