Malicious PDF — malware analysis report

Static analysis result for SHA-256 9595388a81f6645b…

MALICIOUS

PDF

95.4 KB Created: 2021-03-29 23:58:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6cba066a0106a0640fe2f74df861ffe8 SHA-1: a61e15753efb76f43e510ecc3332cc6423f40b08 SHA-256: 9595388a81f6645b35a280a1e366a09e144ae1e2fe6bb8872315d57a663de6d4
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for SEO spam or phishing campaigns. The heuristic 'PDF_SEO_LINK_FARM' specifically indicates a large number of external PDF links, suggesting a malicious intent to redirect users. The ML classifier and ClamAV detection further support the malicious nature of this file. Although no scripts were extracted, the presence of embedded URLs and the link farm heuristic strongly suggest a redirection-based attack pattern.

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://maypoin.ru/award?keyword=abramelin+ritual+steps+pdf
    • https://selijejexo.weebly.com/uploads/1/3/0/9/130969160/nitiguv.pdf
    • https://sudororurupe.weebly.com/uploads/1/3/4/6/134602833/6007555.pdf
    • https://femaxina.weebly.com/uploads/1/3/4/8/134886911/durogexabividujar.pdf
    • https://cdn-cms.f-static.net/uploads/4475572/normal_601bc1502020c.pdf
    • https://basedupapopulow.weebly.com/uploads/1/3/4/3/134344364/8662628.pdf
    • https://gumewixolasadaz.weebly.com/uploads/1/3/4/6/134659592/8661666.pdf
    • https://kakejomoweva.weebly.com/uploads/1/3/4/6/134674311/wabajiza-dadireg-vunazukexu-miravaz.pdf
    • https://ketuvukelese.weebly.com/uploads/1/3/4/3/134351906/kepejijaseze-filir.pdf
    • https://static.s123-cdn-static.com/uploads/4470685/normal_5fe2bd7274b5e.pdf
    • https://guravigipide.weebly.com/uploads/1/3/2/8/132815190/a3293.pdf
    • https://cdn-cms.f-static.net/uploads/4455669/normal_604ce6a20f3be.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://6f4861c6-cdf0-4a5f-ba2d-f9c5e5bfbee6.filesusr.com/ugd/77941b_024c481e94d54b1fa95f97d89f74d62f.pdf?index=true
    • http://lemibutudigosuv.rf.gd/talopivugevidi.pdf
    • https://s3.amazonaws.com/napejaxosinages/manual_de_urbanidad_y_buenas_costumbres_carreo.pdf
    • https://4f0754e2-f0c4-47db-826b-83042027646c.filesusr.com/ugd/7a11b0_2bfef79686574439a3180b692b329a9a.pdf?index=true
    • https://s3.amazonaws.com/somisilegex/why_wont_my_coffee_maker_turn_on.pdf
    • http://toradodotuvate.epizy.com/annexure_e1_hssc.pdf
    • http://zerakunutage.epizy.com/19491110308.pdf
    • https://f4b9ed98-44c1-44e6-9966-d9817cd43de7.filesusr.com/ugd/9ced5d_0c95f35d23094bdbb96c35431e6e7af6.pdf?index=true
    • http://razivud.epizy.com/how_to_fix_paper_jam_in_hp_officejet_4500.pdf
    • https://s3.amazonaws.com/tipikaxe/ameritron_al-80b_for_sale.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010f4f.bin
7910ca165b80e5fab38bc8aa1d8b9dfebfea454dcd9889747ed859937161f067		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10F4F 5088 bytes
font_01_sfnt_off00012070.bin
5fbbb36a779212e0de1bc0e1f9c4e96e58b9bd542224711fbaa920fa42d5edc6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12070 13636 bytes
font_02_sfnt_off00014d35.bin
ccd0ea095085b9379100d4de0d13d045157d8501f46cd3db2ef5c00475687e02		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14D35 16088 bytes
font_03_sfnt_off000161ed.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x161ED 4324 bytes

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