Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a6284a1f526390e…

MALICIOUS

PDF

103.2 KB Created: 2021-03-20 04:50:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 727fa5add9fa7da40abc1a0476c86e18 SHA-1: f4cb88753f6a55b4cae1e29262d5510d1b811575 SHA-256: 0a6284a1f526390ed9d3700dcc80c017276514392514f361aea6f3f944c5335c
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical ClamAV detection and an ML classifier. It contains a large number of external links, many of which point to SEO-optimized PDF documents, suggesting a link farm or phishing attempt. One of the embedded URLs, 'https://resalured.ru/award?keyword=national+interest+definition+by+scholars+pdf', is likely the primary lure, attempting to trick users into believing it's a legitimate academic resource. No scripts were extracted, but the PDF structure itself is indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://resalured.ru/award?keyword=national+interest+definition+by+scholars+pdf PDF link annotation
    • https://fekugutupufug.weebly.com/uploads/1/3/4/8/134876907/vivekowubulibir.pdfIn PDF document text
    • http://safijejog.mygamesonline.org/annales_bac_maths_terminale_s.pdfIn PDF document text
    • https://xominamoluz.weebly.com/uploads/1/3/4/3/134319977/gamejozuze.pdfIn PDF document text
    • https://pufoviram.weebly.com/uploads/1/3/4/5/134580195/482fe.pdfIn PDF document text
    • https://verevivomilob.weebly.com/uploads/1/3/0/7/130738769/tiber.pdfIn PDF document text
    • https://xosipepimebat.weebly.com/uploads/1/3/2/6/132682768/5865662.pdfIn PDF document text
    • https://jadafuvirop.weebly.com/uploads/1/3/2/7/132710722/183c8703844c.pdfIn PDF document text
    • https://lepefolavexar.weebly.com/uploads/1/3/0/8/130874674/lurakila_gojibanaxowamof_jidewiv_fapopefupo.pdfIn PDF document text
    • http://bibivire.mygamesonline.org/kenadozakus.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/bezorito/dipper_s_guide_to_the_unexplained_lefty.pdfIn PDF document text
    • https://s3.amazonaws.com/solonebosop/2_timothy_3_1-5_bible_study.pdfIn PDF document text
    • https://s3.amazonaws.com/kefefetafij/element_model_elefw328_screen_replacement.pdfIn PDF document text
    • https://s3.amazonaws.com/wupagivoz/47171267344.pdfIn PDF document text
    • https://s3.amazonaws.com/diwitapezu/662256667.pdfIn PDF document text
    • https://s3.amazonaws.com/fajetufekejo/40122143756.pdfIn PDF document text
    • http://jesasudazewur.epizy.com/el_decameron_de_giovanni_boccaccio.pdfIn PDF document text
    • http://kegotetebam.epizy.com/journey_to_the_center_of_the_earth_2012_cast.pdfIn PDF document text
    • http://fuluxewamotate.atwebpages.com/bimaxebu.pdfIn PDF document text
    • http://gozenabuzixi.onlinewebshop.net/como_aprender_a_dibujar_a_lapiz_paso_a_paso.pdfIn PDF document text
    • https://s3.amazonaws.com/belapawerezuju/92857437526.pdfIn PDF document text
    • http://wugetad.myartsonline.com/diary_of_a_wimpy_kid_2010_movie_screencaps.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015592.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15592 5452 bytes
SHA-256: 1f1d8aa6695f2d371e5828628ae60092eb6c3bbf08bc8a009df817e64741933d
font_01_sfnt_off0001681c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1681C 12064 bytes
SHA-256: 05877d3f69dea653535b66717164b9471973c6b21abc8c2e6ceeafe01c9febbd

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