Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd2b8586703174b4…

MALICIOUS

PDF

74.1 KB Created: 2021-05-10 20:50:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 9d65e82856e9bd480412fad251158ecd SHA-1: 1bd64ef19e0d7de5b10a8ab2cc2fd6b92433c291 SHA-256: cd2b8586703174b4c449a4a4e5d0e0e24d7a0f343dbaae681740022a666c27ed
186 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 0.9997

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://golowaki.ru/strik?utm_term=lan+cable+color+code+b PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4383924/normal_5fc6776c119df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392457/normal_60608b47ada84.pdfIn PDF document text
    • https://vaxurubezinijor.weebly.com/uploads/1/3/4/6/134690270/sijatig_mejemo_kafaluzewupubo_nabakagusafume.pdfIn PDF document text
    • http://topijakalez.22web.org/sabukusadu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403273/normal_5fe4d8c6c62fb.pdfIn PDF document text
    • https://fidojosamesevuf.weebly.com/uploads/1/3/4/5/134594598/9cacd4e146.pdfIn PDF document text
    • http://sasegotib.medianewsonline.com/caso_clinico_de_anemia_ferropenica_en_nios.pdfIn PDF document text
    • https://xatoxelal.weebly.com/uploads/1/3/1/4/131482937/694332.pdfIn PDF document text
    • https://zepitobazelaki.weebly.com/uploads/1/3/4/6/134619491/xukifakudafiwokunap.pdfIn PDF document text
    • http://janorewaxeno.mygamesonline.org/stairway_to_heaven_guitar_solo.pdfIn PDF document text
    • https://sebanibukuj.weebly.com/uploads/1/3/4/3/134354661/b57a8034.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cbd93b9-6378-4f3c-8b1c-f5cc5409df8e/sonicwall_tz_100_default_password.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5cf8f6a9-24f8-465e-8dfe-ee4f05dfa203/nurobuwatujipetopig.pdfIn PDF document text
    • http://jegutebijosez.rf.gd/wusiwobomal.pdfIn PDF document text
    • http://fovuvuk.rf.gd/navodaya_admission_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14e113d0-df1a-49f3-b913-6a1f456f6213/17550036946.pdfIn PDF document text
    • http://lafugigolemetuk.rf.gd/zoxejetudefavonufagag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/067b661f-2d67-47d5-873e-2bbcbe5f728b/how_to_convert_jpg_to_on_macbook_air.pdfIn PDF document text
    • http://zakivijojinikij.epizy.com/pefevopesesifipadokesobu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09cff525-0608-45eb-90d9-a44dafc9db83/how_to_adjust_tyrolia_bindings.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_off0000e548.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE548 4836 bytes
SHA-256: b2a4d7fabf4f88b9e995221f38046d20126d71b6fb5641e9e6aafe427c9458f3
font_01_sfnt_off0000f5c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5C0 10880 bytes
SHA-256: cc1b311173dec13860a823b1a063e91a9e8cc4a48f9b45e739dffe0496d0162c

Open this report in the interactive analyzer, or submit your own file for analysis.