Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c46a7fa396863d7…

MALICIOUS

PDF

85.3 KB Created: 2021-03-14 20:08:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 55021cd1c76c6e4cfa63d71c2878c41e SHA-1: 512820029b93364a202c76beb946e5a12dd682e3 SHA-256: 6c46a7fa396863d7976b347f04257060120f1e31883d5ff1176447177b7094f0
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9994

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 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://botokaw.ru/award?keyword=a4+size+paper+with+lines+and+border+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4402948/normal_5fed5b2743de3.pdfIn PDF document text
    • http://jezonikiroka.mygamesonline.org/18796896644.pdfIn PDF document text
    • http://juwupexutaval.mywebcommunity.org/how_to_replace_ear_pads_on_beats_studio_2.0.pdfIn PDF document text
    • https://pagipakudux.weebly.com/uploads/1/3/5/3/135343553/kotenumemudekolebuk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404290/normal_6038c3a37c8cb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371013/normal_5ff0eb75887d6.pdfIn PDF document text
    • https://jutovadisew.weebly.com/uploads/1/3/4/7/134720627/b6bc97ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387033/normal_6032843fb775e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413468/normal_5fd2650e80b09.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476767/normal_6038727285fff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402481/normal_602e4fa6e032f.pdfIn PDF document text
    • https://xawizavikerid.weebly.com/uploads/1/3/4/5/134525990/1461592.pdfIn PDF document text
    • http://wowovamofuzo.sportsontheweb.net/judel.pdfIn PDF document text
    • https://weluperexofabed.weebly.com/uploads/1/3/5/3/135382791/1507490.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/jaloto/69857154193.pdfIn PDF document text
    • https://s3.amazonaws.com/nawosineromigi/80028804074.pdfIn PDF document text
    • https://s3.amazonaws.com/benubapopikaj/adobe_flash_player_opera_mini.pdfIn PDF document text
    • https://s3.amazonaws.com/dazinibonofobi/borderlight_apk_xda.pdfIn PDF document text
    • https://s3.amazonaws.com/juzinaramip/how_to_become_a_trustee_of_a_college.pdfIn PDF document text
    • https://s3.amazonaws.com/juvosi/veguxojizigugotesejevepo.pdfIn PDF document text
    • https://s3.amazonaws.com/lurutopobi/12296682404.pdfIn PDF document text
    • https://s3.amazonaws.com/difigomisosak/40017519545.pdfIn PDF document text
    • https://s3.amazonaws.com/sixenogafopoj/arabic_font_keyboard_free.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010dc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DC1 5488 bytes
SHA-256: c38ad0acb7abf835e287649a4072de612e7d0a8281052a4c204f4e4bee2a7d76
font_01_sfnt_off00012080.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12080 10908 bytes
SHA-256: 8c9f218d71e55492c2219f9f70f2417304eed69645877724edafe44943044b54

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