Malicious PDF — malware analysis report

Static analysis result for SHA-256 53ef64ed8c63ff7d…

MALICIOUS

PDF

103.3 KB Created: 2021-06-12 08:56:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: e5189a6b80fefd6b2165096c83098cde SHA-1: ac61592146415df90fa356e69f216508d82b9cc0 SHA-256: 53ef64ed8c63ff7d8f8e3ffc6b8a80c9a7f61f30f75ca1ae66d6ed375a31a6f7
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to distribute malicious content or phish users. The document body, though heavily obfuscated, contains text related to a 'schengen visa' application, which is a common lure for phishing campaigns. The ClamAV detection and ML classifier further indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://jottigo.ru/123?utm_term=application+for+schengen+visa+poland+pdf PDF link annotation
    • https://ziwarojuwetupo.weebly.com/uploads/1/3/4/3/134343479/ea1624ae426.pdfIn PDF document text
    • https://bunogijadijis.weebly.com/uploads/1/3/4/8/134896562/157a305c.pdfIn PDF document text
    • https://tusutaxuwipafu.weebly.com/uploads/1/3/4/4/134403355/42c96bc66a1b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489730/normal_5fe39564165e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420775/normal_5fdc7a39196d1.pdfIn PDF document text
    • https://faluwesidiji.weebly.com/uploads/1/3/0/7/130738597/6799933.pdfIn PDF document text
    • https://vekosakebasagi.weebly.com/uploads/1/3/4/7/134743747/jasurojamolasenorus.pdfIn PDF document text
    • https://kowedasik.weebly.com/uploads/1/3/1/4/131438617/lozomofatazuku.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388037/normal_5fc818ac540f3.pdfIn PDF document text
    • https://pufujodixig.weebly.com/uploads/1/3/1/4/131438007/vezetuzusinibex-wekigimedelajub-wowiwusopepu.pdfIn PDF document text
    • https://rupanusevufow.weebly.com/uploads/1/3/1/3/131380126/53ac0d2e53518.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460045/normal_60084fddc2a70.pdfIn PDF document text
    • https://difekubo.weebly.com/uploads/1/3/4/7/134714923/3940958.pdfIn PDF document text
    • https://gafewifem.weebly.com/uploads/1/3/1/3/131379815/cda7be060c2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497650/normal_5fff6cd624f12.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445737/normal_602d217b3a717.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365636/normal_6027617a167dc.pdfIn PDF document text
    • https://vuwisirikufav.weebly.com/uploads/1/3/4/7/134765545/jewururinax.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369764/normal_60c3e6b943f3d.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4451556/normal_60aff33566dfe.pdfIn PDF document text
    • https://fifitusaperofij.weebly.com/uploads/1/3/4/6/134605769/poxuxekakela.pdfIn PDF document text
    • https://lebivituwaw.weebly.com/uploads/1/3/1/8/131856954/7652300.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/8bb1e722-236d-40b1-9b9b-3d67647da28c/dorothy_must_die_movie_trailer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36336b00-5899-4d7d-85a0-a1fb4f1645e8/mukogisogarotazu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e58a77ce-2279-4a84-8595-4f2609107780/58182636952.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000145c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145C6 5252 bytes
SHA-256: 905286ccf9f8ffcd4e552f71fddfbfaa7bb6eb8204ce523fc385da224d6bc214
font_01_sfnt_off0001579a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1579A 12548 bytes
SHA-256: 600d6b303485ed9e1945928477a393c6102688f0a97d4f8e4bf734dea893c7b0
font_02_sfnt_off00018045.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18045 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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