Malicious PDF — malware analysis report

Static analysis result for SHA-256 1aa61fa473cc1cf9…

MALICIOUS

PDF

82.5 KB Created: 2021-03-16 13:43:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 8e14bd430e5bbd5fc82de0dea1a81819 SHA-1: 2ada1dc2eb878de9d14d4028fe11ef0c3404774c SHA-256: 1aa61fa473cc1cf90ec51b0f4857b7390abade8c9a7a51bd662886c5e89025f2
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains numerous external links, with a high-confidence heuristic identifying it as an SEO link farm and a lure for free downloads or phishing. The primary URL, https://jumiwimov.ru/strik?utm_term=what+hours+are+the+stock+market+open+today, is presented as a search result for stock market hours, indicating a social engineering pretext. While no scripts were directly extracted, the PDF structure and link farm behavior strongly suggest it's designed to redirect users to malicious sites for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://jumiwimov.ru/strik?utm_term=what+hours+are+the+stock+market+open+today PDF link annotation
    • http://durebemidiges.getenjoyment.net/los_medios_de_comunicacion_actualmente.pdfIn PDF document text
    • https://dojepojejexun.weebly.com/uploads/1/3/4/6/134668276/nemakamolo_relapipotapaxes_dofimeturozu.pdfIn PDF document text
    • https://fofonamid.weebly.com/uploads/1/3/4/8/134869219/jolomukukox.pdfIn PDF document text
    • http://e-devletturkiyeaidatsistemimgovtr.com/how_to_create_vinyl_decals_cricutqgk6p.pdfIn PDF document text
    • http://ig-copyrightviolation.com/xilomajekundyy.pdfIn PDF document text
    • http://mifvideo.space/big_moe_s_diner_menuc9dyo.pdfIn PDF document text
    • http://hookup154.site/25764461304k6o34.pdfIn PDF document text
    • http://majikok.mygamesonline.org/alternator_working_principle_download.pdfIn PDF document text
    • http://fotonagosuslugi-01.space/11274733681lg751.pdfIn PDF document text
    • https://robesiladobaluj.weebly.com/uploads/1/3/0/8/130813577/zowetodokeno.pdfIn PDF document text
    • http://jajuviramigawo.medianewsonline.com/understand_stock_market.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://09af0a6c-c0e6-47ff-90c1-5b173435ccd1.filesusr.com/ugd/b92b66_29fdf747b73a438198fe66168cd6dde7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jixerubowi/70693618696.pdfIn PDF document text
    • https://s3.amazonaws.com/vawoginele/88156688609.pdfIn PDF document text
    • https://s3.amazonaws.com/fikuvine/accounting_information_system_ais_definition.pdfIn PDF document text
    • https://s3.amazonaws.com/ronenitevodo/5_principal_beliefs_of_christianity.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwamoxamo/51064241633.pdfIn PDF document text
    • https://s3.amazonaws.com/wunojipu/ap_lang_argument_essay_thesis_example.pdfIn PDF document text
    • https://cee4a208-09ac-40e0-983f-4c2cc776acbe.filesusr.com/ugd/5ed537_9cb87acc672941c4828f8f5c23e9c2af.pdf?index=trueIn PDF document text
    • https://83d12552-0bc1-4415-b221-1da25caacb9b.filesusr.com/ugd/1e11d0_1613dfb37de54262b243c8d2f19fa908.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jajuzasalikirut/what_is_the_difference_between_stihl_250_and_251.pdfIn PDF document text
    • https://s3.amazonaws.com/ziwuvijevo/petsafe_anti_bark_spray_collar_troubleshooting.pdfIn PDF document text
    • https://6f1239e7-da96-47bf-8adb-22d47a96a9da.filesusr.com/ugd/bb5a15_d9cc8ca29e5d4a19a443c00974731d51.pdf?index=trueIn PDF document text
    • http://jemileti.atwebpages.com/old_skool_vans_black_white_gum.pdfIn PDF document text
    • https://s3.amazonaws.com/geradi/gopofewuwiwupuxajagev.pdfIn PDF document text
    • https://s3.amazonaws.com/luworizesupox/fce_practice_exam_papers_2_answers.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010550.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10550 5460 bytes
SHA-256: 0e2034110599e5183a454bd43bb6df1faf7b5abf75b8c95a6755c1df3d108cb4
font_01_sfnt_off000117cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117CD 10548 bytes
SHA-256: 7786aeae8a19ccb24c1421e5cc2fe8a331aac88be84246c99c47fff2de794d8c

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