Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ed13864d6a84b58…

MALICIOUS

PDF

74.1 KB Created: 2021-02-26 12:13:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 06abdd6a3ec967fe576a294d7f585fe7 SHA-1: 7c8cab611afba2ca8bb5cc431e796a218b7b1e4f SHA-256: 3ed13864d6a84b58df0981fa5a625cac5accdc02bb014eb5c6bdfafb3f7df0cb
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and a machine learning classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or redirection scheme. The primary URL points to a page discussing PS3 firmware downgrading, which is a common lure for phishing or malware distribution. No scripts were extracted, but the PDF structure and extensive external linking indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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://midufefew.ru/123?utm_term=how+to+downgrade+ps3+4.75+to+3.55+with+usb PDF link annotation
    • http://lezigovedavide.getenjoyment.net/bbg_free_workout.pdfIn PDF document text
    • https://tugadebijo.weebly.com/uploads/1/3/4/0/134042488/zapatamitama.pdfIn PDF document text
    • http://keto-menu.online/creative_resume_template_word5anan.pdfIn PDF document text
    • https://xejotonevuxujuj.weebly.com/uploads/1/3/1/3/131379732/7028185.pdfIn PDF document text
    • https://wukodotimage.weebly.com/uploads/1/3/4/4/134487216/wulorubanatapotagug.pdfIn PDF document text
    • http://raguvigawak.mypressonline.com/it_chapter_2_does_eddie_dies_in_the_book.pdfIn PDF document text
    • https://kusavavatixe.weebly.com/uploads/1/3/4/8/134878613/399781.pdfIn PDF document text
    • http://tonedomopoja.scienceontheweb.net/5668499497.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460446/normal_600ddf2de2d74.pdfIn PDF document text
    • https://mexukisigugat.weebly.com/uploads/1/3/4/7/134702857/zuvetejedapug.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375194/normal_5fc731c9ba7b5.pdfIn PDF document text
    • https://boxavukexuzar.weebly.com/uploads/1/3/0/7/130775797/zekalole_moxugito_kuladad.pdfIn PDF document text
    • https://gebedosoxabitox.weebly.com/uploads/1/3/5/3/135324181/9596869.pdfIn PDF document text
    • http://theraisins.pro/2423089517842tqr.pdfIn PDF document text
    • http://trackengine.host/suntrust_fraud_prevention_numberrj22f.pdfIn PDF document text
    • http://magnitoli-2ekran.site/sewobuf374de.pdfIn PDF document text
    • http://punejew.mygamesonline.org/super_mario_land_3_wario_land_cheats_gameboy.pdfIn PDF document text
    • https://zubisixoligifi.weebly.com/uploads/1/3/4/4/134479514/logobiwuw-jigogixoxu-basepidoxesej-zemarefom.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484807/normal_600aa0fdf3ad9.pdfIn PDF document text
    • https://nuguviroguzemek.weebly.com/uploads/1/3/1/0/131070089/542468.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000df6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF6F 5872 bytes
SHA-256: cb08d8512a36f2813c6cb68f096cbf8c4cd6dc6d98c5c8787bf63aae705c2502
font_01_sfnt_off0000f38d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF38D 11140 bytes
SHA-256: 13b8226d3951c5c6dd8511778818ab0dce97906d429d75fccd2a811f5594eb85

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