Malicious PDF — malware analysis report

Static analysis result for SHA-256 571ff249ff10760c…

MALICIOUS

PDF

73.3 KB Created: 2021-04-04 13:16:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 94d253e91daa08177075d00e86c2fe7b SHA-1: df82b7fa881ef4d41f6d4538d84fe28f62793b9f SHA-256: 571ff249ff10760cd5b552b0f8023b9d8c0b5d2b289b7026a514938abc7d49c2
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying it as a link farm designed to redirect users. One of the primary URLs, 'https://jumiwimov.ru/strik?utm_term=pobre+ana+in+english+pdf', is directly associated with the document's apparent lure. While no scripts were explicitly extracted, the PDF structure and the high ML classifier score indicate malicious intent, likely to lead users to phishing or malware distribution sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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.
  • 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=pobre+ana+in+english+pdf PDF link annotation
    • http://namedaun.fun/casio_g_shock_gw500a_watch_bandems20.pdfIn PDF document text
    • http://helplnstagramcontact6088756.com/kohler_forte_kitchen_faucet_manual75hj3.pdfIn PDF document text
    • http://zuvatewovu.scienceontheweb.net/15688659479.pdfIn PDF document text
    • https://kekulepolunan.weebly.com/uploads/1/3/4/8/134889268/5472877.pdfIn PDF document text
    • https://saxepuxuk.weebly.com/uploads/1/3/4/4/134472003/pofob_kixapilowe.pdfIn PDF document text
    • http://tokio-2020.fun/wosomop93f81.pdfIn PDF document text
    • http://xepuxesadara.mypressonline.com/dufobe.pdfIn PDF document text
    • http://kulinar2020.site/nhl_pronunciation_guidebd1c3.pdfIn PDF document text
    • https://panonalosisewe.weebly.com/uploads/1/3/5/3/135316392/kezezulijago.pdfIn PDF document text
    • http://forajadafogaxuv.medianewsonline.com/30392366239.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fujadabez/minority_stress_theory.pdfIn PDF document text
    • https://s3.amazonaws.com/kelageketisefuv/free_willy_theme_song_piano.pdfIn PDF document text
    • https://e4034479-4ead-418b-af8c-5be8dc72bdbe.filesusr.com/ugd/1e8759_e5bfc0fb25634179baa8ea67a741eb92.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fukepez/83951145468.pdfIn PDF document text
    • https://s3.amazonaws.com/bevekizadoxuj/89844388636.pdfIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/corporate_social_responsibility_describes_the_firms_quizlet.pdfIn PDF document text
    • https://b8e64ff8-a522-4625-8e91-70fe47930cb2.filesusr.com/ugd/37987b_1b95910e57aa46a2b72ce01bc111c0c9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/juzinaramip/what_are_the_steps_to_becoming_a_delta_sigma_theta.pdfIn PDF document text
    • https://s3.amazonaws.com/bezutu/xolakaturakutupusos.pdfIn PDF document text
    • https://e437b920-fa79-41d5-b67c-0ca059f4e77a.filesusr.com/ugd/d97c10_f7bfee3592254e36b71cc09a004d2b37.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/muvazi/intersecting_parallel_lines_worksheet.pdfIn PDF document text
    • https://fc06435f-e709-4c80-b59d-96fa470c1a13.filesusr.com/ugd/bdc04d_2491206bad984403a49bd56eed2e6da0.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dfc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFC5 5444 bytes
SHA-256: d9e4992869b3fe9b8f8f28a4942bdb131f3fd73a3774eafb1a3d5c123db8a6e4
font_01_sfnt_off0000f23a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF23A 11020 bytes
SHA-256: dc6f663993f23233b2aaa9fa70b0a6533e46f1f418cf534ae53662093ede4ded

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