Malicious PDF — malware analysis report

Static analysis result for SHA-256 d774ef012b503f79…

MALICIOUS

PDF

71.8 KB Created: 2021-02-10 17:13:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: b2f27e549257f10388d620dc3df23634 SHA-1: b8b5568b3194d808d3aa5063144b8bc84a7136fa SHA-256: d774ef012b503f79bbb1850f310ff6fc5823ef15172300dcf4295ff6382d8ecd
186 Risk Score

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://bologen.ru/aws?utm_term=vocabulary+worksheet+6th+grade PDF link annotation
    • https://suwelebebos.weebly.com/uploads/1/3/5/9/135959353/3047985.pdfIn PDF document text
    • https://xalifabosivibu.weebly.com/uploads/1/3/0/7/130775217/jexajano.pdfIn PDF document text
    • http://svoytrylend.xyz/vesukenijiwoje929ha.pdfIn PDF document text
    • http://yesnutural.space/xudekusuwevifenudufogotaoyfq5.pdfIn PDF document text
    • https://nopuderegitiber.weebly.com/uploads/1/3/0/7/130775440/891351.pdfIn PDF document text
    • http://yandex-delivery.cc/wevizurimazaxucxnnf.pdfIn PDF document text
    • http://gloslides.com/qualcomm_atheros_ar5007egvql1m.pdfIn PDF document text
    • http://sbrf.link/xewesuk1rhfa.pdfIn PDF document text
    • https://gugeropufil.weebly.com/uploads/1/3/0/8/130874104/jiwisejusit.pdfIn PDF document text
    • https://xuvosaxefon.weebly.com/uploads/1/3/4/6/134605895/7187313.pdfIn PDF document text
    • https://boluzevorekov.weebly.com/uploads/1/3/1/3/131384542/8002878.pdfIn PDF document text
    • https://sojozukajarab.weebly.com/uploads/1/3/4/2/134265810/tarujisol_rimujade_levuvuje_vafazodatax.pdfIn PDF document text
    • https://xorizelipuv.weebly.com/uploads/1/3/1/6/131637744/fevivuvenu_pefovelut_wibozusitumojat_raragudir.pdfIn PDF document text
    • http://hustlinmoney.com/25339936149wlatd.pdfIn PDF document text
    • https://mexukisigugat.weebly.com/uploads/1/3/4/7/134702857/866977.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_off0000dbea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBEA 5716 bytes
SHA-256: ef09d3f84ea4ce39b1b5b94d97a900af492adeeef4c9b66377c56bce47e6cf5d
font_01_sfnt_off0000ef73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF73 10308 bytes
SHA-256: b8da2cc6e410ceca322e1f16a2632ba90c41ab8c696fc35d37f332b50a57ddee