Malicious PDF — malware analysis report

Static analysis result for SHA-256 c60b21b44715cf51…

MALICIOUS

PDF

85.1 KB Created: 2021-03-05 19:50:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 790c997eadf2ea00a6a0b323d2870a29 SHA-1: 99f7604cc531c67ec63bdb6c829546edbb0cc8ba SHA-256: c60b21b44715cf516fed973dedc9b5ffdcdfe95954ce98ecb5c2ad28599413d7
156 Risk Score

Malware Insights

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

The PDF document contains numerous external links, a common tactic for SEO link farms and phishing. The ML classifier and ClamAV detection strongly indicate maliciousness, specifically a phishing attempt. The embedded URLs suggest the document is designed to redirect users to potentially harmful sites, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://midufefew.ru/123?utm_term=who+founded+american+eagle+outfitters PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4474450/normal_6027b1d946ec9.pdfIn PDF document text
    • https://vewiwuxipax.weebly.com/uploads/1/3/2/6/132681682/gowekenu.pdfIn PDF document text
    • https://vifutezovabul.weebly.com/uploads/1/3/1/4/131408528/3515688.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465538/normal_60001a0c19e91.pdfIn PDF document text
    • http://ruvujagefeko.mygamesonline.org/xamawusepolojoruwaluwep.pdfIn PDF document text
    • https://sidopaxabu.weebly.com/uploads/1/3/1/3/131398246/6fc8f.pdfIn PDF document text
    • https://fopulowaledini.weebly.com/uploads/1/3/1/6/131637921/bederev.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486552/normal_6036a0524c229.pdfIn PDF document text
    • http://rasazajafatirek.mypressonline.com/how_to_become_a_prosecutor_attorney.pdfIn PDF document text
    • http://lebedugipul.mywebcommunity.org/the_whipping_boy_movie_trailer.pdfIn PDF document text
    • https://kidamevu.weebly.com/uploads/1/3/1/4/131437276/sakojufadagupi-xutive.pdfIn PDF document text
    • https://zobimodajozo.weebly.com/uploads/1/3/4/3/134340865/bijipolemixab.pdfIn PDF document text
    • https://nusuxoxoli.weebly.com/uploads/1/3/2/7/132710665/16c774c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410694/normal_5fd2f583223f7.pdfIn PDF document text
    • http://mizebojusur.mypressonline.com/baby_groot_live_wallpaper_android.pdfIn PDF document text
    • https://pajobozonojamu.weebly.com/uploads/1/3/3/9/133997184/3894351.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jimugivos/how_to_program_directv_remote_rc71_to_genie.pdfIn PDF document text
    • https://s3.amazonaws.com/tojazudibumogab/53289187593.pdfIn PDF document text
    • https://s3.amazonaws.com/godoremitiwuja/medieval_2_total_war_kingdoms_unit_id_list.pdfIn PDF document text
    • https://s3.amazonaws.com/gurafoga/chrome_flags__enable-_android-_night-_mode.pdfIn PDF document text
    • https://s3.amazonaws.com/wiremeresegikon/ninelaroxusokumukemetaza.pdfIn PDF document text
    • https://s3.amazonaws.com/gupojakami/borbaad_song_320kbps.pdfIn PDF document text
    • https://s3.amazonaws.com/damerirazib/32687135515.pdfIn PDF document text
    • https://s3.amazonaws.com/wewuxuviwar/10741539162.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_off00010f42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F42 5448 bytes
SHA-256: 9c5aaf16485f04681e98bfdc7a39872336991eb4686a64b89e96ac2b65523db2
font_01_sfnt_off000121af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121AF 11028 bytes
SHA-256: f4fd32943c02fed4312d7b903497555872b69ec73a444bf47a681149386eeb80

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