Malicious PDF — malware analysis report

Static analysis result for SHA-256 29b6c57549833d98…

MALICIOUS

PDF

76.9 KB Created: 2021-03-11 04:45:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cbf04830cc61e97735c01f3c369e0dc5 SHA-1: b67edc87bcc8f7625333e1cf7fff3b2eaa3fbb32 SHA-256: 29b6c57549833d98c3b59c055f8dea8a566ea259002cf87ba7e2e4cf329bac15
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, many of which are to suspicious domains, indicating a link farm or SEO abuse tactic. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan. The presence of embedded URLs and the overall structure strongly suggest an attempt to redirect users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xezojetit.ru/wix?keyword=when+i+look+into+your+holiness
    • http://wowitaly.pro/703451673996rpej.pdf
    • https://joziwofu.weebly.com/uploads/1/3/4/0/134012586/1272813.pdf
    • https://bepirujeli.weebly.com/uploads/1/3/1/8/131856565/667280.pdf
    • http://faponabon.mygamesonline.org/photo_book_printing_services_near_me.pdf
    • https://gekaketiba.weebly.com/uploads/1/3/1/4/131455198/c7e3da0e7a.pdf
    • http://islemleriniz.org/how_to_treat_osteoarthritis_in_spine7i6mh.pdf
    • https://tubolapibakosi.weebly.com/uploads/1/3/4/8/134872187/ef3786c744b4d.pdf
    • http://riwotivadejud.sportsontheweb.net/73255167513.pdf
    • https://sevujixosatanin.weebly.com/uploads/1/3/5/3/135316334/xudizulunidavobevud.pdf
    • https://widoripitobagat.weebly.com/uploads/1/3/4/8/134882637/570323.pdf
    • https://tivenudonokokom.weebly.com/uploads/1/3/0/9/130969369/jikaz-lifamusekikeze-rekomigimekuj-xojil.pdf
    • https://bifukumuvu.weebly.com/uploads/1/3/5/3/135347201/xegano-sipulos-nepuxewusip-pofaxofovu.pdf
    • https://serudifatu.weebly.com/uploads/1/3/5/3/135324897/zukexunola_vinubob_vujonenawegap.pdf
    • http://dsv-trening.ru/bodyguard_film_song_teri_meri3xj4g.pdf
    • http://lifolibi.sportsontheweb.net/24310775027.pdf
    • https://finaxapiw.weebly.com/uploads/1/3/5/3/135301963/3066723.pdf
    • http://wusokamojifel.scienceontheweb.net/90449814824.pdf
    • http://electorat.org/pemofakejaxoxr66m9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wemofodi/aggiornamento_instagram_musica_apk.pdf
    • https://d0446368-1163-4bd0-898c-f46ba4c9991b.filesusr.com/ugd/4cd51e_faa3f0f9a4c84121a25af207c357600b.pdf?index=true
    • https://56a7be67-7dca-40da-a973-69ad719fb73b.filesusr.com/ugd/fedf23_9b3baa090ef34241bcd57c0c75617f41.pdf?index=true
    • https://s3.amazonaws.com/muwomapotumugi/40328004863.pdf
    • https://d201025a-8123-4af6-bbd3-513b73e26e51.filesusr.com/ugd/a64c8c_d107ec5915bd4e0f848adbd76d4cb6fa.pdf?index=true
    • https://s3.amazonaws.com/mozirolinitaje/19996099715.pdf
    • https://1c437d0a-cccb-4a8a-93f1-39e0b5126915.filesusr.com/ugd/b91566_3c40c60515a24e88aa5b4876703b405b.pdf?index=true
    • https://s3.amazonaws.com/midipes/insider_s_guide_to_colleges_online.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_off0000f19e.bin
1e6012a910e730bf6eb951368f77469fddaf2358d788db011671546844e8a8ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF19E 4744 bytes
font_01_sfnt_off000101c9.bin
e59597e8536b07bfd7a45b8dd4cad70b0671187529d89391d3b0f43618673354		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101C9 10464 bytes

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