Malicious PDF — malware analysis report

Static analysis result for SHA-256 32aa18482b93c4c1…

MALICIOUS

PDF

127.7 KB Created: 2021-03-31 07:41:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 37d2c3844d3fe877571e4a8c141bcde9 SHA-1: a45c7774218ae397490aaa2f3b010ce8f1c15f36 SHA-256: 32aa18482b93c4c1609d78299ef0326dd48de46ca95c1f7c1da7e99d488f512c
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a phishing or redirection attack, likely initiated via a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://leonvi.ru/award?keyword=bhaskara+satakam+in+telugu+pdf PDF link annotation
    • https://vesixogis.weebly.com/uploads/1/3/4/8/134863987/b674365c027a6.pdfIn PDF document text
    • http://pofuxubilet.sportsontheweb.net/kukomog.pdfIn PDF document text
    • https://lifovidas.weebly.com/uploads/1/3/1/8/131856672/rajomaguxus.pdfIn PDF document text
    • https://talidifixuj.weebly.com/uploads/1/3/5/3/135390844/vudosofivutoz.pdfIn PDF document text
    • https://joripulugafu.weebly.com/uploads/1/3/4/3/134318872/dd37dde028098ed.pdfIn PDF document text
    • https://mujiborabasovu.weebly.com/uploads/1/3/4/5/134590634/sikaru.pdfIn PDF document text
    • https://zobojosapez.weebly.com/uploads/1/3/1/4/131483592/f1bb474bfda8dc.pdfIn PDF document text
    • http://kotowis.22web.org/comune_di_campoformido_assistente_sociale.pdfIn PDF document text
    • https://zosotise.weebly.com/uploads/1/3/5/3/135393527/9193612.pdfIn PDF document text
    • http://vetovikaxu.mypressonline.com/airline_ratings_2020.pdfIn PDF document text
    • https://mazanotofubemiz.weebly.com/uploads/1/3/2/6/132681192/rebepaseb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://pilejifizodan.onlinewebshop.net/27134843238.pdfIn PDF document text
    • https://dd91dc4b-d2fe-4aab-ab17-22023aa64d5b.filesusr.com/ugd/f05b1d_a837227d636c459a8f3fdbc8a6de2cd2.pdf?index=trueIn PDF document text
    • https://f495c71d-628d-4070-9a3d-b699cbb46ba4.filesusr.com/ugd/d99ef3_8a45eac3944341b9986f6b9e6a5ac75a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3ff0224-b31e-453f-b639-9ca305df2acd/80028110582.pdfIn PDF document text
    • https://9eaa565e-fb97-40b4-b096-d6760803f699.filesusr.com/ugd/55e2c6_1a1c707315824260a5caafc0cc8d7ae1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8cae1d72-a13e-4202-a0f2-12ad7abe3acc/star_wars_age_of_republic_heroes_read_online.pdfIn PDF document text
    • http://xukonepuwe.rf.gd/91460811959.pdfIn PDF document text
    • https://e5447efa-8854-4d04-834e-f0bbd7438c8b.filesusr.com/ugd/ac612b_ff04a8cbc22b46228d83ce9fb2c37487.pdf?index=trueIn PDF document text
    • http://jelomasulavi.atwebpages.com/the_road_not_taken_analysis_line_by_line.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9ddaa62-6c2b-4551-a1e9-1de23c068f4e/audio_biblia_reina_valera_1960_download.pdfIn PDF document text
    • https://203aa715-7352-46b1-b16b-5d0aeeaa27a2.filesusr.com/ugd/0582e0_a00f6b3c062849a0aad9babfd6da1014.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/89189a82-506a-4963-80ea-6358fa5f1693/55195103965.pdfIn PDF document text
    • http://keladosa.epizy.com/figure_of_speech_worksheets_for_grade_4.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_off00017ccd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17CCD 5568 bytes
SHA-256: 7b45a1b02c947c42674642766743e91c4fd36ec32316cfc07a3d0c90b4520093
font_01_sfnt_off00018f95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18F95 25512 bytes
SHA-256: 0f68b98149cfaadca1f6f3f80a148947857c7c3d8900cd00f093e42316630dac
font_02_sfnt_off0001c8c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C8C9 12704 bytes
SHA-256: 8973819f6a1211a0f2ee75315c5b0208c8dfd2e8b9508724d09ca8534765063b

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