Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a0b2eafebddddfe…

MALICIOUS

PDF

82.8 KB Created: 2021-05-15 08:59:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: c567f94ff2db3a867e5395c5c427ad8e SHA-1: 23348021d1afdf84467c712d7d1643373c71a562 SHA-256: 0a0b2eafebddddfec77942985a87e9821a34720b81bd3da7c171b205c1ddd06b
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate maliciousness. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a phishing or SEO spam campaign designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://seumenha.ru/strik?utm_term=la+casa+de+bernarda+alba+english+act+3+summary PDF link annotation
    • https://vemusosafuz.weebly.com/uploads/1/3/1/3/131398108/5604135.pdfIn PDF document text
    • http://tebogekememesij.mygamesonline.org/belupidifejenidotid.pdfIn PDF document text
    • https://bujegeti.weebly.com/uploads/1/3/4/3/134355457/mogerexetaw-rapigonidaju-poxivifub-basabetigewiko.pdfIn PDF document text
    • https://mosaminaworite.weebly.com/uploads/1/3/1/6/131636744/kemasokepok.pdfIn PDF document text
    • https://gitutibilaralib.weebly.com/uploads/1/3/1/3/131384503/xesovuji.pdfIn PDF document text
    • http://lubevos.scienceontheweb.net/safonotoparos.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://ebc1add8-0b9d-418e-9e4a-1e287827e933.filesusr.com/ugd/ab63e3_31dcae857ae24d07a952e0fdc5886280.pdf?index=trueIn PDF document text
    • http://reviwegovamu.rf.gd/chemistry_periodic_table_quiz.pdfIn PDF document text
    • https://6e229dea-1f83-4be8-8cd3-388eabd4f5e3.filesusr.com/ugd/1cfe37_230a6bd2ff174635ad462ec6137cd277.pdf?index=trueIn PDF document text
    • https://6632aaff-1fe9-4f1d-acb3-7d444e457837.filesusr.com/ugd/ce4b7c_6ee401147ad24568ac769035d5963262.pdf?index=trueIn PDF document text
    • http://gebogozomusedom.rf.gd/kolekibumufatuzifex.pdfIn PDF document text
    • https://47a25507-5c4f-4e73-9b7c-0c49514c8174.filesusr.com/ugd/e00bd3_153d2a0283d247438b8dcb6199cb7d04.pdf?index=trueIn PDF document text
    • https://229013d5-0e14-4531-be8c-43df84542e77.filesusr.com/ugd/e4a895_7324b7cfb787446bbc2647b3bc1effe0.pdf?index=trueIn PDF document text
    • http://zurimuvuk.epizy.com/introductory_geographic_information_systems_jensen.pdfIn PDF document text
    • https://b03e51a8-7171-48c0-94d6-e4c032e6f37f.filesusr.com/ugd/9421c8_531cc25d7f22464cb53408ed7edda202.pdf?index=trueIn PDF document text
    • https://2a082fd4-e93f-4b8e-9e59-408fa046b31c.filesusr.com/ugd/e334dd_73eb726eae32428dbe359c44e0b96b89.pdf?index=trueIn PDF document text
    • https://0d3c4653-ec4b-4b04-9c20-59e348ba858e.filesusr.com/ugd/62200f_f6b9da2ed07049dfb5f20675cf2a23d3.pdf?index=trueIn PDF document text
    • https://45ed8376-e832-497f-ab20-0a31924dc5db.filesusr.com/ugd/4b7290_8d8833ae1f004430aabd1eff8c5bd692.pdf?index=trueIn PDF document text
    • http://bufopalepigugu.epizy.com/big_ideas_math_algebra_1_california_edition.pdfIn PDF document text
    • https://43fe4710-460a-4ad3-90dc-2dd795c51528.filesusr.com/ugd/a32c20_7a7e992672304b61ae604063133e1249.pdf?index=trueIn PDF document text
    • https://ad843f61-c544-48d7-8cfb-3c048b9edb46.filesusr.com/ugd/0dd9ed_1802c8869d2348de972ac78be45b3496.pdf?index=trueIn PDF document text
    • https://c6b89c2f-dc7d-490d-a648-077c51828da9.filesusr.com/ugd/29ab01_0d52c3499a9449dea46e6720e32f3701.pdf?index=trueIn 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_off0000f6e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6E2 5472 bytes
SHA-256: 74d66e3d37122f566ea20fb9470e780571e26c248163ea8808313b0ae9d3a979
font_01_sfnt_off00010945.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10945 11480 bytes
SHA-256: 30618b7e79b5b84aa645adced9c8e7d4aabc50d20d11e129d1829adb12aa5a62
font_02_sfnt_off00012f24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F24 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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