Malicious PDF — malware analysis report

Static analysis result for SHA-256 b391b918dd93fd7f…

MALICIOUS

PDF

71.3 KB Created: 2021-03-04 13:59:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: be70b0c390710ded35b17c340e35c7e3 SHA-1: b21c05f7646671296c2cb9b891dc8d9e95a68e40 SHA-256: b391b918dd93fd7f3d6d5cfc210a6adbae6b8298437f4577420d134aa2e22a25
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://druttle.ru/award?keyword=how+to+reset+a+sansa+clip PDF link annotation
    • http://wijasagasipode.getenjoyment.net/53005894866.pdfIn PDF document text
    • https://kosilamegorigi.weebly.com/uploads/1/3/1/4/131409210/3387301.pdfIn PDF document text
    • https://cdn.sqhk.co/xipepovivik/e5theij/books_like_crossing_the_chasm.pdfIn PDF document text
    • http://raponikidosal.getenjoyment.net/21420889305.pdfIn PDF document text
    • https://renugukid.weebly.com/uploads/1/3/0/9/130969315/78cc2af10eb9aa0.pdfIn PDF document text
    • https://mitapesazo.weebly.com/uploads/1/3/4/6/134652839/9976173.pdfIn PDF document text
    • https://menekagamop.weebly.com/uploads/1/3/4/0/134097565/82f3e2a9.pdfIn PDF document text
    • https://vufuredupe.weebly.com/uploads/1/3/0/7/130776381/widamisijatogeronole.pdfIn PDF document text
    • https://gelujesu.weebly.com/uploads/1/3/4/8/134847850/3738591.pdfIn PDF document text
    • https://cdn.sqhk.co/mewidexe/wiigelO/rutozutamirabubenovenusav.pdfIn PDF document text
    • https://gobazivow.weebly.com/uploads/1/3/1/0/131070387/8676625.pdfIn PDF document text
    • https://valojeruxul.weebly.com/uploads/1/3/4/6/134681631/3166462.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/705984d3-beda-49dc-9ecb-655ed97c488b/30707734583.pdfIn PDF document text
    • http://zikoliduxa.atwebpages.com/85263844496.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59f3dfba-648a-4e31-b65c-edbfd309fffe/how_to_reset_stabilitrak_light.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82ffc455-0214-421e-82d1-2474e58f943e/rerexu.pdfIn PDF document text
    • http://kepagewav.atwebpages.com/do_dominos_pizza_have_msg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ec2dc23-b99b-48c3-a7a2-6134bbd6b18c/is_apple_cider_vinegar_good_in_tea.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05b9fd85-812f-4432-8e72-0b2e1596de23/jebimutobemasileferetamu.pdfIn PDF document text
    • http://rabatelekovufar.myartsonline.com/ledaviluzare.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_off0000db94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB94 4980 bytes
SHA-256: 600d8a4a6511b835516618d4b0f48fca44b5068cc3e9f68cbbcf59f8470dab7c
font_01_sfnt_off0000ec9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC9F 10400 bytes
SHA-256: d2d4fed36a5bc619388cadf464191cd1f66b782badc0aaf00c5cb5f8245fdeb3

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